Program: Nestopia 1.40
License: Open Source/GPL 2
Description: Nintendo Entertainment Emulator
Other: I only found one registry setting about a DirectX handler. (I think!)
As promised, I checked out all available NES emulators out on Sourceforge. This is the one, that run runs very stable and I had least problems with. I tested it on my EeePC only running WinXP Home SP3.