Glad you got it worked out. By the way, GK and Auto GK are NOT the same product. I have both. AutoGK is good for making DivX/Xvid files, but GK is good for getting all the helper apps properly installed and for setting up a basic AVISynth script.

I need to update the guide. You can load your .AVS scripts directly in TMPGEnc, bypassing the need to make an AVI in VirtualDubMod and saving a ton of room on your drive. Also, the latest version of Womble can do decent upmixing of 2.0 to 5.1 AC3. I've played with it some and gotten some reasonably good results.