I emailed w1zzard (the guy who came up with the software hack in windows) about the feasibility of this driver hack in linux, hopefully i get a reply sometime soon. I have the card that this hack works for, and it works fine with no problems. I use drivers from
www.omegacorner.com, but its pretty much the same idea. In the event that this isn't possible w/ linux drivers, the hardware mod is pretty much the only option. Make sure the software mod works in windows before you attempt the hardware mod to make it happen in linux. check
www.hardocp.com forums and
www.rage3d.com forums search for 9500 hardware mod you'll find tons of info. basically what you have to do is remove the cooler and do some resistor solder work. i havent tried it and personally am frightened of ruining my board, but i may attempt it if there is no chance of linux drivers. ill update once w1z emails me back.