[MacBookPro] Question!

I run GuildWars using Parallels Desktop and works Great! But my MacBook Pro is a little old, It still runs really fast doing most if not all tasks, But when it comes too gaming it seems too have fallen short over the last two years.

I was wondering if anyone has a Macbook Pro from around 2008 that can help me. Here are the specs of it.

Model Name: MacBook Pro
Model Identifier: MacBookPro2,2
Processor Name: Intel Core 2 Duo
Processor Speed: 2.33 GHz
Number Of Processors: 1
Total Number Of Cores: 2
L2 Cache: 4 MB
Memory: 4 GB

ATI Radeon X1600

Its having trouble running newer games big time, I'm aftraid too dump money into new hardware if there is a really good PC that can do it better.

Thanks all,

-RJ