You're on the right track.

The error codes issued in the BSOD, coupled with the following reference, will help you narrow it down further:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/devtest_g/hh/DevTest_g/t06_bugs_B0_7a93f797-6ab2-41ff-bbae-20e9e66897d5.xml.asp

Personally, from what I've read on the MSFT site, my money would be on a device driver software error. Pulling the memory simply shifted the layout of your Windows kernel memory around a bit and has hidden the error for now. You could detect bad RAM by running any memory tests available in your POST/BIOS, or by downloading any one of the shareware memory tests (especially the bootable RAM tests).