I bought an unused gamepad from a secondhand shop (brand new, but no returns) after seeing that it had a USB connector, but not realising that it was for a PS3.  It's a POWER A Pro EX, and would be great if I could use it. Anyone know of a way to make it work on a PC? I read that there are drivers available for the standard sixaxis controller to use on a PC, but they didn't work so well with this one.

*EDIT*
When I plug it in, Windows does see it, calling it a "human interface device", so I don't believe it has a "PS3 only digital signature", and one of the drivers I tried actually made it show up on the Windows control panel under game controllers, where I could calibrate it and everything, but none of the games I have installed could see that it was connected. Or am I doing something wrong there too?

Any helpful thoughts would be appreciated.