Okay, well I'm glad you're looking into a fix for the game, skaman.
I was considering buying it last summer around the same time I bought Phantasy Star II, Phantasy Star III, and Sword of Vermilion, but since I didn't see much information about Phantasy Star IV on this board around that time, I decided not to buy it at that time.
Even then, I try to only have one save file for a game when there is room for more than one, with some exceptions (like compilation games that have their own "individual" save files for each game).