1 GB of ram? Check the software for minimum PC system requirements.It will say how many MHz is necessary to play the game.It will also give you what video card (min),RAM(min),DirectX (7 or Higher?) this game requires MINIMUM to run.Quite often the game will run,but poorly.Your AMD 2200 runs at 1800 which isn't lightening fast,but sufficient.I think the addition of at least 1 more GB of RAM is what you need,a total of 3GB would really make the computer happy when playing games.
Run this program from Microsoft to test your current memory for errors.
My computer is much like yours,I have XP Media-The 8600 card,a dual core 2.8 processor and 3GB of RAM.This setup will run a online racing game without hick ups at 1152 x 864 resolution.When I only had 1GB of RAM it would stutter like it was constantly trying to load the program,so I added another Gig and it started playing allot better.It couldn't keep up with Halo online until I added another 1GB for a total of 3GB.I am using a 32x version of XP,going to a 64x setup would improve performance even more.
Sorry,I'm talking too much.Try the RAM after you test what you have,you'll be glad you did!