(for XP SP0-SP2 / 2003 SP0)
MemImager performs a memory dump using NtSystemDebugControl. See more at Memory dumping with NtSystemDebugControl
Download the exe file and run it from a Command Prompt. It will give you the instructions you need.
Q: When I double-click on the file a window comes up and disappears immediately. What's wrong?
A: You must run the file from a Command Prompt.
Q: I have a question that is not covered here. Where can I get help?
A: Send me
your question. I can't promise that I will have time to answer, but I'll do my best.