PDVD5/BSPlayer help needed.

I'm surfing for a new capping program that will let me take 1024x768 sized caps, and I've heard great things about PowerDVD5. However, does anyone know if it will cap .AVIs or .MPEGs?

Or, if it doesn't, does anyone know how to make BSPlayer take hi-res caps? I've edited the settings, but it never actually takes the big caps, it just takes caps of the movie's original size.