Is there any chance you could let me have the "How To" guide you were hoping to do as we've pent days trying to crack the same problem, ie an dual boot mac with a windows partition (currently XP) and we have built the PC image for all our windows PCs which we can deploy to them using Ghost or as wim images but can not get any joy with the imac despite being able to boot to a Bart PE disc and put the wim file on..it just hangs on starting services and we can not seem to get the drivers on using the reapir option.
We are looking at Mac Minis and Windows 7/Mac OSX and great to have a guide that could cracks some of the issues?
Finally found a stable way to do this, still in the testing process. You need a network share drive and a Windows PE Disk, problem solved, using imagex tool to capture and deploy the image with no errors at all. For guide use the links below
Create a Bootable Windows PE Disk - Spiceworks (Create a Bootable Windows PE Disk)
Use ImageX to capture a Windows 7 Image - YouTube (Use ImageX to capture a Windows 7 Image)
Deploying a WIM Image - YouTube (Deploying a WIM Image)