In doing some reading regarding kitchen building and SYS resources I came across the OSKitchen tool at XDA. This looks interesting because it supports multiple phones from the same tool and imports files from stock roms. Has anyone here looked at this and/or have experience with it? EXT's are check boxed in or out depending on what you want to include which is kind of slick.
If you have not seen it, here is a link to it:
http://forum.xda-developers.com/showthread.php?t=628948