hi, anyone knows about reason 3 multiprocessing capabilities?
is there any?

Check this link out.. It explains in detail what "ReWire" is capable of...
It should sum up the answer to your question pretty well

http://www.musiciansnews.com/28/prop...ry_stand.shtml

Primary take-away from that site:

"With ReWire, the synthesis and sequencing power of Propellerheads' Reason and ReBirth can be seamlessly integrated with Pro Tools, Logic, Cubase, Sonar, Nuendo, Live, Melodyne and now GigaStudio 3. Multiple applications can be run simultaneously as slaves using ReWire. For example, Reason, Melodyne, and Live can be integrated into a master Pro Tools session, with each application's audio streams controlled through the master session."

thanks a lot!
I'll try to use Live as final sound generator in order to use the multiprocessor capabilities