I have just written a new software program called "Style Format 2 Converter".
The program converts styles in SFF2 format used in Tyros 3 to the older style file format used in other keyboards.
This is s "raw and technical" conversion meaning you have to revoice, adjust OTS, effects etc. to match your keyboard features.
More information and download: http://www.jososoft.dk/yamaha/software/sf2c/index.htm