The PPP emulator blows more than I can handle. I'd stick with Stepmania for sure. Now that SM4 has added controller capability, you'll be able to play with your actual controller, if you have one that is. There are tons of videos and such at
www.paraparastage.com , so have a look there and see what you can find. If you have any questions about a certain video, youtube it, or ask around. =)