Patches and discussion for Ensoniq VFX family

hi guys,
i have a couple of questions.

1.i read yesterday about upgrading a vfx-sd sequencer from 25,000 to 75.000 
notes. is this still possible and if so, where would i get this done.

2. what is the most current OS? im running OS 2.1. if there is one after 
this, how do i go about installing the newest one and will be older 
sequences play on the newer OS.


thanks in advance, rick