Creating a theme for the Incredible by modifying framework-res.apk then create an update.zip

[Bl4z3]

I'm trying to create a theme for my Inc and then make an update.zip so I can release it here on the forums. But I need a little help before I get started.
I can handle the graphic design part and I think I know how to edit .9 png's, but I'm having a little trouble with getting the files to modify and creating an update.zip.

Would I:
reboot into recovery
go into the partitions menu
mount /system

adb pull /system/framework/framework-res.apk

To get the files I need to edit, edit them

Then:

adb push framework-res.apk /system/framework/

unmount /system
reboot?

Then how would I take those same edited files and create an update.zip?

Thanks