After reading a bit, it seems that to play Super Famicom games on a USA SNES, all I need to do is take a pair of tweezers and remove two little bolts/stubs/bits ect.
I'm wondering...which 'bits' are these? If anyone knows, could you please point it out using the picture I took:
http://i31.tinypic.com/2vv76v7.jpg
Sorry for the blurriness.