A factory restore might be your only option, cause a quick Google didn't find any targeted repair methods for that paticular trojan. I'm guessing it moved all your programs and documents somewhere, probably intending to hold them hostage until you give the nice people in the masks the money they asked for, which is a interesting new trend in malware.
You can try just using the Windows search function to find everything, making sure to check the Search Hidden Files and Folders option, but there's a decent chance that your malevolent buddies have things sealed up tighter than that. Anything else would require a degree of repair-fu that is beyond me outside the
Ballmer Peak