Sorry, thought you were using Templates provided by CubeCart.
As these are Templates you purchased, don't see any problems (Legal or Otherwise) with having them converted.
Might cost a bit though. Template conversions are not routine and take time. Might even be better if you have the original PSDs, as the those can easily be sliced for perfect use.
Yeap I have the original PSD's! :) :)
Why or Why I ever used CubeCart I have no idea!
ZenCart has so much more features it isn't even funny.
The forum here seems very active and very helpful. There are lots of Tutorials and helpful posts. I am looking forward to switching to ZenCart!!