Reinstall..
use Add/Remove Programs and remove SFC 3
delete the SFC 3 game folder
Reinstall SFC 3 only, say no to GSA and say no to Direct X 8.1
use SFC 3 Patch 1.01 Beta 2 build v500 to patch.
go into your SFC 3 game directory and find the SFC3.exe, right click and select properties, click on compatibility tab and make sure there is a check in Disable Visual Themes, click OK.
then choose how you want to play.. if you care for a mod, your ready for it, if vanilla, your ready for it.
Gl and HF