I just read this at the Cricut.com messageboard. (Thanks Karen!)
I tested it out using my daughters laptop and it actually works!
If you have an Expression and a jukebox (I knew it would come in handy someday) you can cut with any of
your cartridges in the TRIAL VERSION of Design Studio so long as you have Plantin Schoolbook as one of the carts in the jukebox.
I then tried it out with my Personal Cricut making sure the George cart was in the jukebox and it worked too, so I assume it would work with the Create also so long as the Don Juan cart is in the jukebox.
The vital ingredient here is the Jukebox. So now I can have a full working (cutting) version of DS on both my computers!