BSOD at startup. most likely ntkrnlmp.exe

Hi, So I get a BSOD before I get a chance to log in. All the leads tell me that this is usually a specific driver, how do I find out which ones, and how would I fix it? At the moment I'm dual booting off a WinXP drive so I can still access the Win7 drive which is how I could read the dmp file. I have also tried doing a fresh install on a blank drive on the same machine (after removing...