IMac :: Transfer Files From Dead 2006 17'' To Another Computer?

I have a Windows 7 custom-built PC and I also have an old, first generation Intel iMac from 2006. The iMac was running only Windows XP. The reason for that was that the screen of the iMac got cracked. I connected another monitor using mini-DVI connector and installed XP on the thing while I still could see certain things behind the broken screen. The reason I chose Windows was because in the Windows Intel Graphics Configurator program I had the ability to disable the main iMac screen and use the attached display as the main one. I did not have such option in OS X. I could select the attached display as the main one but could not shut down the iMac screen.

Anyway, it has been a year since then. Today my Windows OS on the iMac became corrupted. But, of course.. I cannot see what the error message says during boot because the iMac screen is broken completely now. The attached display only turns on when fully booted into Windows. So, I cannot reinstall Windows.. I cannot do anything. There were some important files on the iMac which I want to recover. I have SATA to USB controller which I used before on my computers but, from what I understand, these iMacs have laptop hard drives with different connectors. Can someone please guide me to a specific controller which I could use to connect the iMac HD to my Windows PC and transfer the files? I would be very, very thankful. My iMac is a late 2006 17'' model with 150GB hard drive.