avoid PFS3 on AOS4 (it uses TD64 while AOS4 uses NSD).
I've "been forced" to slowly get rid of all my PFS3 partitions, thanks to AOS4 ;-)
You could use the td64patch but i wouldn't if i were you.
Use SFS 1.279 and you will be able to use AOS3-AOS4 and MOS without any problem
