You're not supposed to bridge the adapter - you're bridging the circuit board in that little plastic casing on the front of the pad. Basically, you're constructing wire leads from the buttons to an a ...
The Radioshack brand USB/PSX adapter works, too - it works fine with my MadCatz ghettopad. That is, if you ignore all the phantom steps and you're willing to bridge it. The pad's only $20, so I can ...