I am editing some footage from 2 digital camcorders. I want to mix the two feeds into a single film.

My problem is that one feed was shot as 16:9 and one as 4:3. I am using Windows Movie Maker version 5.1 on Windows XP. Movie Maker seems to force me to chose one or other aspect ratio for the entire film.

Is it possible to set Movie Maker up so that it will switch aspect ratio for each clip? Or is there a way to maybe letterbox the 16:9 feed into a 4:3 aspect ratio to then use in Movie Maker?

I don't want to buy expensive software.