>Why is it that when I put a bitmap on a button, wherever that bitmap has white, it shows up grey? Is there some way to fix this? The only thing I could figure out is to change the white to the faintest yellow. Then the right colour shows up, but I'd rather have it white than yellow tinged.

You need to create a MSK file:

1. Edit the original WHATEVER.BMP with PAINT
2. Change every not-background pixel to black.
3. Save it as WHATEVER.MSK in the same directory as WHATEVER.BMP.
4. Done!

HTH!