So I have x3 PE on steam, I am about to have an hardware upgrade and will be reinstalling everything and starting over. I never got along with the steam installation paths and whatnot ( I dont exclusively use sonar and the paths can be a bit of a PITA when I am working elsewhere) I am wondering if I was to buy a disk set from the Cake webshop would I be able to install from those and use my steam serials to activate it?
 
Cheers, Greeny.

Don't know, I would call Cake customer support or/and email them and ask them directly. 
 
Cj

This is your music on steam:
 

Steam often seem to use serials from batches issued exclusively to them. As CJ says, talk to Cakewalk customer services and see what they say.