diff -r d7b354eef058 virt-install
--- a/virt-install	Thu Mar 04 15:55:38 2010 -0500
+++ b/virt-install	Thu Mar 25 08:01:16 2010 -0400
@@ -594,6 +594,9 @@
                     default="",
                     help=_("Additional arguments to pass to the kernel "
                            "booted from --location"))
+    insg.add_option("", "--initrd-inject", type="string", dest="initrd_injections",
+                    default=[], action="append",
+                    help=_("Add given file to root of initrd"))
     parser.add_option_group(insg)
 
     stog = OptionGroup(parser, _("Storage Configuration"))
@@ -734,6 +737,7 @@
     installer = instclass(type=hv_name, os_type=virt_type, conn=conn)
     installer.arch = capsguest.arch
 
+    installer.initrd_injections = options.initrd_injections
 
     # Get Guest instance from installer parameters.
     guest = installer.guest_from_installer()
diff -r d7b354eef058 virtinst/DistroInstaller.py
--- a/virtinst/DistroInstaller.py	Thu Mar 04 15:55:38 2010 -0500
+++ b/virtinst/DistroInstaller.py	Thu Mar 25 08:01:16 2010 -0400
@@ -19,6 +19,10 @@
 
 import logging
 import os
+import sys
+import shutil
+import subprocess
+import tempfile
 
 import _util
 import Installer
@@ -177,6 +181,36 @@
                                          readOnly=True,
                                          transient=True)
 
+    def _perform_initrd_injections(self):
+        """Insert files into the root directory of the initial ram disk"""
+        tempdir = tempfile.mkdtemp(dir=self.scratchdir)
+
+        gzip_proc = subprocess.Popen(['gzip', '-dc', self.install["initrd"]],
+                                     stdout=subprocess.PIPE, stderr=sys.stderr)
+        cpio_proc = subprocess.Popen(['cpio', '-i', '-d', '--quiet'],
+                                     stdin=gzip_proc.stdout, stderr=sys.stderr, cwd=tempdir)
+        cpio_proc.wait()
+        gzip_proc.wait()
+
+        for filename in self._initrd_injections:
+            shutil.copy(filename, tempdir)
+
+        find_proc = subprocess.Popen(['find', '.', '-depth', '-print0'],
+                                     stdout=subprocess.PIPE, stderr=sys.stderr, cwd=tempdir)
+        cpio_proc = subprocess.Popen(['cpio', '-o', '--null', '--quiet'],
+                                     stdin=find_proc.stdout, stdout=subprocess.PIPE, stderr=sys.stderr, cwd=tempdir)
+        new_initrd = self.install["initrd"] + '.new'
+        f = open(new_initrd, 'w')
+        gzip_proc = subprocess.Popen(['gzip'], stdin=cpio_proc.stdout,
+                                     stdout=f, stderr=sys.stderr)
+        f.close()
+        cpio_proc.wait()
+        find_proc.wait()
+        gzip_proc.wait()
+        sys.exit(1)
+        os.rename(new_initrd, self.install["initrd"])
+        shutil.rmtree(tempdir)
+
     def _prepare_kernel_and_initrd(self, guest, distro, meter):
         if self.boot is not None:
             # Got a local kernel/initrd already
@@ -210,6 +244,9 @@
             self._tmpfiles.append(kernelfn)
             if initrdfn:
                 self._tmpfiles.append(initrdfn)
+                
+            if self._initrd_injections:
+                self._perform_initrd_injections()
 
         # If they're installing off a local file/device, we map it
         # through to a virtual CD or disk
diff -r d7b354eef058 virtinst/Guest.py
--- a/virtinst/Guest.py	Thu Mar 04 15:55:38 2010 -0500
+++ b/virtinst/Guest.py	Thu Mar 25 08:01:16 2010 -0400
@@ -145,6 +145,7 @@
         self._os_type = None
         self._os_variant = None
         self._os_autodetect = False
+        
 
         # DEPRECATED: Public device lists unaltered by install process
         self.disks = []
diff -r d7b354eef058 virtinst/Installer.py
--- a/virtinst/Installer.py	Thu Mar 04 15:55:38 2010 -0500
+++ b/virtinst/Installer.py	Thu Mar 25 08:01:16 2010 -0400
@@ -81,6 +81,7 @@
                  extraargs = None, os_type = None, conn = None):
         self._type = None
         self._location = None
+        self._initrd_injections = []
         self._extraargs = None
         self._boot = None
         self._cdrom = False
@@ -175,6 +176,12 @@
     def set_location(self, val):
         self._location = val
     location = property(get_location, set_location)
+    
+    def get_initrd_injections(self):
+        return self._initrd_injections
+    def set_initrd_injections(self, val):
+        self._initrd_injections = val
+    initrd_injections = property(get_initrd_injections, set_initrd_injections)
 
     # kernel + initrd pair to use for installing as opposed to using a location
     def get_boot(self):