Using a PS3 controller?

[AlphaKennyWhere]

I love the emulator and thank you for putting so much work into it. I played around with it on my laptop and had a program that let programs read my ps3 controller as an xbox controller. My problem is the set up for it was a little sketchy and I don't want any malware on my new PC. I looked around the forums for a bit and couldn't find a thread about this. The search function was useless and showed me random threads that had nothing to do with what I typed.

So how do I get a PS3 controller to work with Dolphin? I already have a gamecube controller but at a location I won't be in for about two months so I'd rather not buy another controller and some USB adapter when I have a PS3 controller right in front of me.
EDIT: I used Better DS3 along with.. I think MotionJoy.

[Garteal]

Don't use that, use XInput Wrapper for DS3 instead. It's much better and more importantly, not malware.