MO3.EXE
This is a file that comes with the Bass library that allows you to make MO3 files out of your modules. An MO3 file is a MOD or derivative that has had its samples MP3 compressed, making their files smaller (many times smaller in most cases). If you've got modules over a meg in size, consider using MO3.EXE on them. It might be worth the time.

-nek