I have successfully imaged and deployed windows 7 pro 64 bit. I did nothing different than 32 bit, because FOG doesn’t care about the 32/64 bit part of the OS. Fog does have problems with OEM hidden/recovery partitions, so I either install fresh or use gparted to remove that partition and recover the space.
I do not use FOGPREP or SYSPREP before I image. I do sysprep early on during the image creation process, but only to copyprofile. I then finish installing programs and changing settings, then remove from the domain and upload the image without sysprepping or fogprepping. Most of the time, I don’t even have to chkdsk or defrag.
The one thing I do is use a mutliple partition - single disk image type because that’s how it got it to work and all machines I image have the same size or larger HD as the one I took the image from.
FOG is free and we are all volunteers on the forums, trying to help when and where we can.