I currently have a Dell Inspiron 1545 with an Intel Core 2 Duo processor with 2.0 ghz processor speed. It has 4 GB ram and 320 GB hard drive. But the problem is the graphics card. It has an Intel Media Accelerater 4500 graphics card. I am looking to upgrade to something that will play the sims 2 a little better. Can you give me some choices and a link on where to actually buy them. I am looking at the 100 to 150 price range

The Dell Inspiron 1545 is a notebook. The graphics is a run by an integrated processor in the mainboard using shared memory, not a "graphics card" in the sense that it's something you can swap out. There are no options for supplementing that setup. It is not possible to upgrade the graphics.

You would need to purchase a notebook that has a dedicated graphics system but they tend to cost a little more and use more power. They vary in ability greatly but if you are interested in replacing the notebook there are people in here who could help you select a model.