If your using a ClockWorkMod recovery you can transfer files, folders, apk's, etc, from the PC to any system file/folder, or back. Delete or add anything you desire with a straight drag and drop using QtADB. This is an older utility that has been greatly improved by nijel.
It will also flash a recovery, boot into fastboot, and more. I have added it to the All Things Root Guide sticky.
If any member thinks something needs to be in the ATR Guide sticky, PM me with a link to the developers site that has the direct download link. Please, no direct download link's, just links to the dev site or page on a community forum.