
I think a lot of people have the same problem as I with Sony Vegas. To disable resampling you have to right click and choose the option on every single clip in your project.
But a little while ago I found this tutorial that gives you a script and shows you how to use it in Sony Vegas. With this you only need one button to disable resample on the entire project.
I hope it helps you save time and nerves working on your AMVs

-Dawn