To all Win7/Vista users: Please run mod installers as administrator to make sure all files have been installed and overwritten. Read the following link for more instructions: Run as Administrator - Windows 7 Forums For SFC3:Rexpansion Mod, you should also run the "switch" shortcut as administrator. Because they will install required specs files for the mod and need access to your sfc3 folder which is usually located at C:\Program Files. The last advise is optional, but I highly recommend you not to install any "application compatibility" related optional updates. I found they usualy break old games compatibility rather than improve it.