[behanjc]

Yes. If you have Stepmania installed, in the start menu folder, there should be something called Stepmania Tools. Open this then choose the option Add songs. Simply browse for the song(s) on your computer (.mp3 or .ogg) and add them. You can also add them manually but this way's easy as well. Then open the game Stepmania and on the main screen there should be an option Edit/Sync Songs or something similar to that. Click that and locate your song. It will probably be in My Creations.

Your lucky I'm posting this much so read the stickies if you don't know how to make steps. And PLEASE don't press Ctrl+R and tap to the song if you want anybody to think about playing your file. No matter how much you think it would help to make steps by tapping along as the song goes, it always turns out poorly.

Good Luck