doom9.org
doom9.org
doom9.org
doom9.org
doom9.org
doom9.org
doom9.org
doom9.org
doom9.org
Honestly it is the best place for this stuff. If you want to use the free programs like AVISYTHN and VIRTUALDUB, head over to their forums and search first, then ask away.
I'd almost bet my left nut that any question you have is already answered in the forums, so make sure you spend some time searching first.
Learn avisynth, it is worth the effort, but you need to know virtauldub too, so maybe play with some of the virtualdub filters first to get your head round it, and then try applying the equivalent thing using avisynth as an experment an see how you go.