I don't know of any homemade patches, but I know Square punched out a few of their own. I don't know where to find them, but they're about 20 Mb each.

It would also help if...
- you listed your OS.
- you listed your graphics card.
- you knew if there was something not quite right about your soundcard.

My best uninformed guess would be that you're using WinXP, and that it doesn't like FF8.