do you think i have enough power to run both cards
The specs for just one 9600 GT requires a 425 w psu with 28 amps on the 12V rail. You will probably want to upgrade to at least a 600w, preferably one that is SLI certified. Keep in mind you'll need one 6-pin PCI Express supplementary power connector -or- Two 4-pin Molex supplementary power connectors, provided your card comes with an adapter, for each 9600 GT in your system.
Also, pay attention to the power supply's amps per rail. I prefer having a single rail. Check out this PC Power and Cooling 610w with 49 amps on a single rail. Not sure if that will do it.http://www.newegg.com/Product/Product.aspx?Item=N82E16817703005
Nvidia has a list of recommend psus based upon various SLI configerations. Granted, yours is a little older and not listed, but it will give you a good idea of what you'll need and what brands they recoomend. http://www.slizone.com/object/slizone_build_psu.html