Check out all your other bushings/rubber as well!
Ok...
Now you are on the slippery spending slope:D :D
Yes, raising the rears would assist in reducing oversteer....to help you out, here's a neat little linky to the Tire Rack tire pressure chart....
[URL="http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=58"]http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=58[/URL
So, the links are shot...they are pretty cheap....and how are your rubber sway bar bushings??? Do you like a nice ride or can you take a little more NVH? You could replace the standard rubber bushings with, say, neoprenes if you don't mind additional NVH. If you don't want to spend lots of dosh, some small bushing upgrades can make the suspension a tad firmer/more responsive without costing a fortune.