I'm really busy with school and a few other things, otherwise I'd take more time to try to figure this stuff out myself. Anyway:

1) If I wanted to change the cursor bitmap in the main menu without overwriting the original, what tag would I need to edit to reference a new bitmap? I figured this question out, the cursor bitmap is referenced in the following file:
levels\ui\ui_tags_loaded_all_scenario_types

2) Can I resize the main menu buttons ("Multiplayer", "Settings", "Quit", etc) without changing the actual dimensions of the bitmap? If so, how? (I want high-res buttons so when people are playing in higher resolutions it doesn't look pixelly)

That's all I can think of for now... I think I had a few other questions but I can't recall them at the moment.
Edited by seanthelawn on Feb 1, 2010 at 08:23 PM

Modifying the scale of the buttons will just make it pixely, the same as playing in a large resolution.

I meant that my bitmaps are highres and I'm going to scale them down; it still doesn't look good if I do that?

It'll look good.

Oh cool, how exactly would I go about scaling them down?

Check "Use hi-res scale".