I Never have done this before , but my guess is that you "only" have to route the stereo signal out of the pc , to an amp ...

(anyway ... this is how i should have done it ... )

I didnt found any related sites yet , but im almost 99% sure its been done the way i explained ... (lol , its probably that 1% who kills me though ..lol)

But i can advise you to have a google search ...

http://www.soundonsound.com/sos/dec0...ntech_1206.htm

The page above has some nice tips and tricks on using reason live ...

Greetzzzzzzz and good luck !!!