IDM stand for Internet Download Manager, which is a program that can accelerate downloads up to ten-fold, depending on whether the site you're downloading from supports download managers (Flash Get would be another one).
By the way, thanks to LOTR, I'm now aware that the LW media player is actually only meant for music files, not videos......
Though I've previewed a lot of files already, I've actually never realized that I see the movies with my default players (Media Player Classic and VLC). It just slipped my mind...
Anyways, I'm sure you'll be satisfied with the results using VLC......
Regards