I haven't tried it but I think that's already possible. In the focus module, you can select which CCD to perform the focusing and hence you can select a different target from the primary CCD.
thank's for your reply,
I think I badly explained, when I said change the target, it was to move the scope to other coordonates.
Then focus with the main CCD, but in other direction of the sky.
So you need 2 sets of coordonnates, one for the DSO, an other for the focus star. And the mount slew from one to the other.
Is it more understanding ?
I'm sorry, my english is a little rusty