Fs2004 Radeon Mobility How Can I Improve My Game Performence On My Laptop?

How can i improve my game performence on my laptop? - fs2004 radeon mobility

Hello,
I have an Amilo Li1718 laptop / notebook or another, I have 2 GB of RAM (I upgraded from 1GB) Intel Dual Core 1.73 GHz, Windows Vista
The graphics card is a computer game performance ATI RADEON 200 m Back! I was told that I can not update, FS2004, the thinking on the high at about 15-20fps, and I said something about an external graphics card that I found and I can, it would be expensive, there are other ways to improve the graphic. . I can not see most of the graphics card, because its core chipset
Please give me some suggestions, and I can not afford a new computer