I have an Intel Celeron Processor at 2.0 GHz and 256mb of ram and A Geforce 5500 Fx Card

Ok I was wandering what most should i do to make sims2 run smooth i have it i can run it but when am downtown or something there are really long LOAD times and framerate issues i have never upgraded a pc before tell i got this Gpu

so what should i do Get More meomory? A better Gpu? or just a new PC i really dont plan on running much more then this game thanx in advancedWell, according to the system requirements, you seem to barely MEET the minimum requirements.  That should be enough, but it wouldn't hurt to add a bit more RAM.  The problem might lie with your video card.  Your particular card doesn't appear to be SUPPORTED, so you might want to upgrade to a slightly better model.  This is just how it looks to me anyway.  Someone else might have a better suggestion.

You could always reduce the resolution of your game.  Oh, and make sure you have the latest drivers for your video card.  That could make a difference.A new GPU WOULD give you the best boost, or a RAM upgrade.
RAM is cheaper and will help with ANYTHING you do, GPU is more expensive but will help more with games.