Hi Dmarie, sorry I was offline all day Thursday which is unusual for me. Thank you for replying to the questions in the other thread, that really helps me.
Myates gave great advice about the epsom salt treatment so I would definitely advise following that. You said you think his eye has actually popped out? Err, I don't suppose you have a pic of that, do you? If his eye has indeed popped out, my biggest concern is letting it hang there on his face. I would suggest removing the eye somehow but I think only a veterinarian would be able to safely disconnect all the nerves etc.
In addition to the epsom salt, I would also suggest trying API Tetracycline to treat the bacterial infection causing the popeye. Also, if you can find it (Petsmart usually does carry it), a product called Kordon Fish Protector may be beneficial here as well.
I hope this info helps and doesn't come too late. I'll check back.