I have quite a bit of experience with Polaroid prints, transfers, lifts, etc. If it's the pack film style (the type you peel apart), you can soak the entire print in room temperature water (water only) after it sits a while see if the paper is lifting, if so you can softly help nudge it. Most likely some of the dried slime is still on the print. By slime, I mean that nasty smelling developer that was used, if so it will get slimy all over again and the paper will roll off. If it does not get slimy you can continue your soak, aiding gingerly (nice word huh

, gingerly), in the removal of the paper. It will eventually lift off. Lay your print on a screen or something similar to air dry. It may appear mottled or off color but that will go away as it dries again. Good luck, give me a shout if you need more info and let me know it went okay.
Chris