@spence88 First you must download a software called winrar then google for a emulator to download after that download the rom and open it in winrar above the file there should be a "extract" button basiclly it puts the file alone in wherever you select. open up your emulator I recommend snes9x then play!
Well I am sorry to hear that you came across this error. You really had something special going here, and it is sad to see it come to an unfortunate end. I am not too familiar with a romhack or anything but it sounds like there is no real way to get it back or pick it up somewhere. At least you got to finish one island, I suppose, to look on the bright side.