diff --git a/src/vmm/LibVirtDriverKVM.cc b/src/vmm/LibVirtDriverKVM.cc
index 6aca971987..c3b10c4e67 100644
--- a/src/vmm/LibVirtDriverKVM.cc
+++ b/src/vmm/LibVirtDriverKVM.cc
@@ -69,7 +69,9 @@ int LibVirtDriver::deployment_description_kvm(
     string  model      = "";
     string  ip         = "";
     string  filter     = "";
+
     string  default_filter = "";
+    string  default_model  = "";
 
     const VectorAttribute * graphics;
 
@@ -86,6 +88,7 @@ int LibVirtDriver::deployment_description_kvm(
     string     acpi    = "";
 
     const VectorAttribute * raw;
+    string default_raw;
     string data;
 
     // ------------------------------------------------------------------------
@@ -438,9 +441,11 @@ int LibVirtDriver::deployment_description_kvm(
     // Network interfaces
     // ------------------------------------------------------------------------
 
-    get_default("NIC","FILTER",default_filter);
+    get_default("NIC", "FILTER", default_filter);
 
-    num = vm->get_template_attribute("NIC",attrs);
+    get_default("NIC", "MODEL", default_model);
+
+    num = vm->get_template_attribute("NIC", attrs);
 
     for(int i=0; i<num; i++)
     {
@@ -484,9 +489,20 @@ int LibVirtDriver::deployment_description_kvm(
             file << "\t\t\t<script path='" << script << "'/>" << endl;
         }
 
-        if( !model.empty() )
+        string * the_model = 0;
+
+        if (!model.empty())
         {
-            file << "\t\t\t<model type='" << model << "'/>" << endl;
+            the_model = &model;
+        }
+        else if (!default_model.empty())
+        {
+            the_model = &default_model;
+        }
+
+        if (the_model != 0)
+        {
+            file << "\t\t\t<model type='" << *the_model << "'/>" << endl;
         }
 
         if (!ip.empty() )
@@ -679,6 +695,13 @@ int LibVirtDriver::deployment_description_kvm(
         }
     }
 
+    get_default("RAW", default_raw);
+
+    if ( !default_raw.empty() )
+    {
+        file << "\t" << default_raw << endl;
+    }
+
     file << "</domain>" << endl;
 
     file.close();
diff --git a/src/vmm/LibVirtDriverVMware.cc b/src/vmm/LibVirtDriverVMware.cc
index af020b506c..2319eafe14 100644
--- a/src/vmm/LibVirtDriverVMware.cc
+++ b/src/vmm/LibVirtDriverVMware.cc
@@ -65,6 +65,8 @@ int LibVirtDriver::deployment_description_vmware(
     string  script     = "";
     string  model      = "";
 
+    string default_model = "";
+
     const VectorAttribute * graphics;
 
     string  listen     = "";
@@ -74,6 +76,7 @@ int LibVirtDriver::deployment_description_vmware(
 
     const VectorAttribute * raw;
     string data;
+    string default_raw;
 
     // ------------------------------------------------------------------------
 
@@ -301,6 +304,8 @@ int LibVirtDriver::deployment_description_vmware(
     // Network interfaces
     // ------------------------------------------------------------------------
 
+    get_default("NIC", "MODEL", default_model);
+
     num = vm->get_template_attribute("NIC",attrs);
 
     for(int i=0; i<num; i++)
@@ -346,9 +351,20 @@ int LibVirtDriver::deployment_description_vmware(
             file << "\t\t\t<script path='" << script << "'/>" << endl;
         }
 
-        if( !model.empty() )
+        string * the_model = 0;
+
+        if (!model.empty())
         {
-            file << "\t\t\t<model type='" << model << "'/>" << endl;
+            the_model = &model;
+        }
+        else if (!default_model.empty())
+        {
+            the_model = &default_model;
+        }
+
+        if (the_model != 0)
+        {
+            file << "\t\t\t<model type='" << *the_model << "'/>" << endl;
         }
 
         file << "\t\t</interface>" << endl;
@@ -437,6 +453,13 @@ int LibVirtDriver::deployment_description_vmware(
         }
     }
 
+    get_default("RAW", default_raw);
+
+    if ( !default_raw.empty() )
+    {
+        file << "\t" << default_raw << endl;
+    }
+
     file << "</domain>" << endl;
 
     file.close();
diff --git a/src/vmm/XenDriver.cc b/src/vmm/XenDriver.cc
index 5dcd0110f8..9be40d3453 100644
--- a/src/vmm/XenDriver.cc
+++ b/src/vmm/XenDriver.cc
@@ -61,6 +61,8 @@ int XenDriver::deployment_description(
     string bridge     = "";
     string model      = "";
 
+    string default_model = "";
+
     const VectorAttribute * graphics;
 
     string listen     = "";
@@ -70,6 +72,7 @@ int XenDriver::deployment_description(
 
     const VectorAttribute * raw;
     string data;
+    string default_raw;
 
     // ------------------------------------------------------------------------
 
@@ -331,6 +334,8 @@ int XenDriver::deployment_description(
 
     num = vm->get_template_attribute("NIC",attrs);
 
+    get_default("NIC", "MODEL", default_model);
+
     file << "vif = [" << endl;
 
     for(int i=0; i<num;i++)
@@ -351,9 +356,20 @@ int XenDriver::deployment_description(
         bridge = nic->vector_value("BRIDGE");
         model  = nic->vector_value("MODEL");
 
-        if( !model.empty() )
+        string * the_model = 0;
+
+        if (!model.empty())
         {
-            file << "model=" << model;
+            the_model = &model;
+        }
+        else if (!default_model.empty())
+        {
+            the_model = &default_model;
+        }
+
+        if (the_model != 0)
+        {
+            file << "model=" << *the_model;
             pre_char = ',';
         }
 
@@ -470,6 +486,13 @@ int XenDriver::deployment_description(
         }
     }
 
+    get_default("RAW", default_raw);
+
+    if ( !default_raw.empty() )
+    {
+        file << default_raw << endl;
+    }
+
     file.close();
 
     return 0;
diff --git a/src/vmm_mad/exec/vmm_exec_kvm.conf b/src/vmm_mad/exec/vmm_exec_kvm.conf
index 5f3ef0d752..a1c4e7e2ce 100644
--- a/src/vmm_mad/exec/vmm_exec_kvm.conf
+++ b/src/vmm_mad/exec/vmm_exec_kvm.conf
@@ -15,14 +15,15 @@
 #--------------------------------------------------------------------------- #
 
 # Default configuration attributes for the KVM driver
-# (all domains will use these values as defaults).  These values can 
+# (all domains will use these values as defaults).  These values can
 # be overridden in each VM template. Valid atributes are:
 #  - emulator
 #  - os [kernel,initrd,boot,root,kernel_cmd,arch]
 #  - vcpu
 #  - features [acpi, pae]
 #  - disk [driver, cache]
-#  - nic  [filter]
+#  - nic  [filter, model]
+#  - raw
 
 #EMULATOR = /usr/libexec/qemu-kvm
 
@@ -33,4 +34,5 @@ FEATURES = [ PAE = "no", ACPI = "yes" ]
 
 DISK     = [ driver = "raw" , cache = "default"]
 
-#NIC      = [ filter = "clean-traffic" ]
+#NIC     = [ filter = "clean-traffic", model="virtio" ]
+#RAW     = "<devices><serial type=\"pty\"><source path=\"/dev/pts/5\"/><target port=\"0\"/></serial><console type=\"pty\" tty=\"/dev/pts/5\"><source path=\"/dev/pts/5\"/><target port=\"0\"/></console></devices>"
diff --git a/src/vmm_mad/exec/vmm_exec_vmware.conf b/src/vmm_mad/exec/vmm_exec_vmware.conf
index a3b5e2a5b4..4a3d7151c0 100644
--- a/src/vmm_mad/exec/vmm_exec_vmware.conf
+++ b/src/vmm_mad/exec/vmm_exec_vmware.conf
@@ -20,7 +20,8 @@
 #  - vcpu
 #  - os[arch]
 #  - disk[dirver]
-#  - datastore
+#  - nic[model]
+#  - raw
 
 #VCPU   = 1
 
diff --git a/src/vmm_mad/exec/vmm_exec_xen.conf b/src/vmm_mad/exec/vmm_exec_xen.conf
index 3d4ac94fba..ccef6d75da 100644
--- a/src/vmm_mad/exec/vmm_exec_xen.conf
+++ b/src/vmm_mad/exec/vmm_exec_xen.conf
@@ -15,15 +15,19 @@
 #--------------------------------------------------------------------------- #
 
 # Default configuration attributes for the Xen driver
-# (all domains will use these values as defaults). These values can 
+# (all domains will use these values as defaults). These values can
 # be overridden in each VM template. Valid atributes are:
 #  - credit
 #  - os [kernel,initrd,root,kernel_cmd]
 #  - vcpu
 #  - disk[driver]
+#  - nic[model]
+#  - raw
 
 #VCPU  = 1
 #OS    = [ kernel="/vmlinuz", initrd="/initrd.img", root="sda1", kernel_cmd="ro" ]
 
 CREDIT = 256
 DISK   = [ driver = "tap:aio:" ]
+
+#RAW   = "data=\"on_crash=destroy\""