Windows 7: Deploying Unattended Lab Image? XP->7

Hello, perhaps I'm in the wrong place for this... however I am looking for some help in regards to deploying windows 7. Sadly my setup is a little complicated and involves Macs so google hasn't been kind to my efforts. We have Windows XP N installed currently with a true volume license. My process for imaging XP is as follows:
-Restore the last image, let it run the unattended sysprep install
-Make needed changes
-Copy our sysprep files and sysprep.inf to the C: and run it, let the computer shut off
-boot into OS X and make a .dmg
-boot all the lab machines to OS X, copy the dmg to them
-restore the dmg to the windows partition, restart to windows
-sysprep again runs the unattended install
The end result is the entire lab is now imaged and joins our Samba run domain.



Now, with windows 7... we don't have a volume license, but instead have a Multiple Activation Key. If I understand correctly I can use VAMT to prevent these machines from using an activation after every image, but now when it comes to sysprep I'm lost. It appears as though the simple .inf file we used for XP now involves copying a .wim and screwing around with a gui. Given how we did things with XP, is this actually what is required or can we taylor our xp .inf to work here. Any help is appreciated.