Your computer sucks. Probably why its freezing is your graphics card can't handle the game, too graphic intensive. Your processor can't keep up. WIndows ME is the most unstable operating system ever released by Mircrosoft, and 512MB ddr i assume is only running at what PC100 or PC133. And as for your motherboard, no problems on your motherboard can cause that. My advice, get a better graphics card, and and also get rid of spyware, etc. Run disk cleanup and other windows utilities and your system might stop crashing on your game.
I removed each card and checked computer each time untill all my cards were removed including video. Borrowed video from friend and that was all that's on machine except CPU 2400xp,full verision ME, 512 ddr (crucial) and ECS K7s5a pro motherboard. System still locked up about 45 minutes after playing AOM. Now as far as I can understand it has to be 1. motherboard 2. ME or 3. CPU. When I asked my computer guy he said it can't be any of the 3, but that's all that was on system except for ati 9000 64 video. There got to be an answer and I feel my computer guy is wrong, so anyone have any ideas or how to check above items. Thanks mech