Those were the spects on my old computer, but with XP.
For Vista, you really need 4 GB of RAM.
For your best performance, you also need nHancer and either AlacrityPC or GameBooster.
Do not choose VSync in the options, and set particle density low.
To speedup loading, you should use only the campaign file of the region you are patrolling and be careful of adding mods as some will be frame rate killers.
Finally, be sure to activate the"lite harbor traffic" mod.
An added suggestion: save up you nickels and invest in a better computer.
