Has anyone had any success with Cakewalk Studio Instruments working in Snow Leopard?  I see that it says it is not supported, but this could just mean it's untested and that it may or may not work or work well in Snow Leopard.  

unsupported means .... it might work and it might not....

If it screws up, don;t call for support advice because...... yep, you guessed it... it's unsupported. 

So feel free to experiment on your own.

I would suggest making a backup before you start in case things go seriously bad, you have a way to get back to where you started.