[Coelacanth]

Here is how you do it:

1. Put the AVI file you want to use into your \Winamp\Plugins\AVS folder.
2. Go into Winamp and start AVS.
3. Double-click on the AVS display.
4. Highlight all of the existing effects in the list on the left, and hit the minus sign button up at top to delete all effects. (You don't want these for now. You can always add stuff later, but for right now, you just want to start clean.)
5. Hit the plus sign button to add an effect. Choose Render, AVI.
6. The options screen that comes up will have a pull-down list box. Your AVI file should be available in the list. Choose it.
7. Bingo!
8. Now you can add any other effects you want, and tweak it the way you like.
9. Go to Preset, Save to save your masterpiece as a preset.