Using ps3 controllers?

I want to use a ps3 controller for this, but I don't know how. Ive installed several apps that should make it work on my PC (vista) but I'm not noticing any changes. Ive rebooted. How do I get it to work?

The experience i've had with those applicatins is that on some computers they work and some not. It worked on my old computer but on my new wich is a vista it doesnt work. Though, i know people have made it work on vista too.