There are some plugins for the Mulab audio editor that Craig Tice wrote available. The 4 channel version is (or at least was) free of charge. Craig used these to create the sessions he contributed, while Scott made his own plugins but hasn't shared them with anyone. Roman Frajt used an earlier version of SS with Mind Workstation to create his. I've used Mind Workstation to create a number of sessions for some dealers who order from us frequently. It's really not hard to do, if you load one of the SS Templates when you create a new session. MWS is a complex program in terms of what it can offer, but actually kind of fun, once you get the hang of things. And Scott posted a number of video tutorials regarding SS session creation on our Youtube channel. I think MWS is a safe bet, provided you don't need actual support from them.

-Robert