I don't really see what the problem would be with a new computer, but I would start by looking at the forum at EA.  There are several issues with both NVIDIA and ATI graphics cards.  I know because I had issues with mine and had to go to the forum to find out what to do.  My card is not the same as yours although it is NVIDIA so I don't know if or what issue there may be, but that is what I would start with.  I also thing beosboxboy has a post here on some of the cards and issues.  Will try to find it.

Before I load my Sims, I press the  Ctrl,shift, and the Escape keys together, it brings up the task manager, under processes I click the user column to sort everything to do with my logon, under my name I disable (highlight the line and click on end process) for each idividual item listed) everything that is running in the background except explorer and the task manager.  If you have Vista however I don't know if the process is the same(I got the instructions for this from the small booklet that comes with the game, it lists it out step by step**look in yours, hopefully it would be in French making all easier for you).

Probably a silly question but did you unistall through the control panel (add remove programs)?  I know if an uninstall is not done properly stuff is left in the registry that is still picked up when you try to install another EP or stuff pack.  I'm not good enough with the technical side to tell you if this is the problem.  Ancient Highway would probably be your best source for this type of situation.

If you don't want the insim (which I have) or use the boolprop testingCheatsEnabled true.  Merola's multi painting is still available at MTS2.

Thank you

Thank you.  I love this body shape.

I love this.  I like vivid eye catching colors.  Thank you.

These are cute.  Thank you.

I really like these.  Sort of like a chemise dress.  Simple but sexy.  Thank you.

too cute.  Thank you..

Lovely.  Thank you for sharing.

Thank you.  My favorite colors.  I love emerald and saphire.

Thank you.  I appreciate your sharing.  Your work is excellent.

This is very Pretty.  I like it.  Thank you.

Thank you.  This is really nice.