Plenty, it just depends on what tool you want to use to do it.
The simplest is probably PSNope. Install PSNope. Open config.txt, change "spoof_idps=0" to "spoof_idps=1" and set "idps=" to the idps you want to use. Place config.txt on a usb drive in a folder named "psnope." Plug the usb drive in the rightmost usb port of your PS3 then run PSNope. Your console id will be spoofed until your turn off your PS3.