About the jig i read a long time ago because some soft brick fear but was never used by me, its basically a small resistence circuit that somebody with electronic knowledge can do. Easely you could get one in ebay. So im almost sure it could work with the galaxy exhibit (because is simillar to galaxy W).
About Odin, the instructions are in the las thread (... not good thread). Download the file. Unzip anywhere you like in the PC. read the instructions. Read again. Then do it. Its easy because it was/is the main way to write stock firmware in samsung any devices.