and from that I can say you only need one boot image. where I work they even have the 32bit boot image used to deploy win-7 64.
Basically its just a basic OS that can grab the image and load it to the harddrive.
I'll drop em all except one 64-bit and one 32-bit image and try that. I pulled the Server 2008 R2 boot image and loaded Window XP 64 bit onto the test VM. -- "All newspaper editorial writers ever do is come down from the hills after the battle is over and shoot the wounded." - Bruce Anderson "I have often regretted my speech, never my silence." - Xenocrates