I wouldn't think there'd be an issue, but I don't know for sure. I've always been on producer. I imagine you could just install on top of it.
Josh Wolfer - Big Dumb Monkey Productions -
www.bigdumbmonkey.com (Twitter @bigdumbmonkeyp)
Sonar 8.5.3 / X1b :: 2.8 Ghz core i7 :: 8GB ram :: V-Studio 700 C+R :: Maudio Profire 2626 (ADAT lightpipe into Vstudio)