I was wrong! GM developers, read this!

I said earlier that I was using external files for the game, thinking it would make the overall file size smaller, but I was wrong.

Game Maker already compresses the images itself, so the file size isn't improved any using external files, and can actually be made worse if you don't use the right bit level (I've actually found out that sometimes 24 bit comes out smaller than 8 bit, so watch out for that).

I hope you guys find this useful, unless I'm actually the only GM user here.