I downloaded the SMPlayer and the extra codecs. I also downloaded ffdshow assuming I need that to run VFW configuration. To enable it the option was libavcodec. I did that on VP6f(flash) and VP6, but I assume the one I really need is VP6f?
In vegas I went to render as, selected avi and clicked custom template, then ffdshow video codec and clicked configure. On the encoder tab of ffdshow, I am unsure what to have set on both encoder and decoder.. The file in vegas is now mpeg1. The decoder option has vp6 and vp6f enabled. I also tried just to have each one enabled separately. I tried many things but the file still renders as .avi
Any more specific instructions would help. Thanks!