Index: target/image/x86/Config.in
===================================================================
--- target/image/x86/Config.in  (revision 5288)
+++ target/image/x86/Config.in  (working copy)
@@ -14,4 +14,17 @@
        depends X86_GRUB_IMAGES
        default 4

+config X86_GRUB_ROOTPART
+    string
+    prompt "Root partition on target device" if X86_GRUB_IMAGES
+    default "/dev/hda2"
+    help
+        The root partition on the final device.  If you don't know,
+        you probably want the default (/dev/hda2).

+config X86_GRUB_BOOTOPTS
+    string
+    prompt "Extra kernel boot options" if X86_GRUB_IMAGES
+    default ""
+    help
+        If you don't know leave it blank
Index: target/image/x86/Makefile
===================================================================
--- target/image/x86/Makefile   (revision 5288)
+++ target/image/x86/Makefile   (working copy)
@@ -25,7 +25,7 @@
   endef

   define Image/cmdline/ext2
-    root=/dev/hda2 rootfstype=ext2
+    root=$(CONFIG_X86_GRUB_ROOTPART) rootfstype=ext2 $(CONFIG_X86_GRUB_BOOTOPTS)
   endef