stripped bolt

i have a 92 SC2. im trying to change the rear brakes. one of the bolts to loosen the caliper appears stripped. how would i remove this bolt without screwing up anything? also, if possible is there any way to remove the bolt with out ruining anything? can anyone please answer as soon as possible. thanx in advance.

http://www.saturnfans.com/photos/showphoto.php/photo/24005/

remember the guide and lock pins are only threaded on one end. i broke a pin inside the frist caliper bracket i did. learn from your mistakes, heated the rest with propane, replaced the bracket, bought new pins. it looked something like this.

http://www.saturnfans.com/photos/showphoto.php/photo/20628/