I'm in the camp that thinks VEPro is worth every penny. Among other things, it extended the life of my current DAW - I have half a dozen instances of VEPro running, and each has half a dozen instances of Vienna Instruments Pro or Kontakt, and somehow (magic?) it works.
I'm about to invest in a slave machine for VEPro, and I'll be interested to see if it is as easy to move over as I've read.
In the meantime I have my OLD DAW running as a slave for audio - I had a Frontier Dakota/Montana and couldn't reuse them, so I left them in the old DAW and that provides 32 channels of inputs. Next step is to use the 32 outputs to control my analog synths, but that is a ways off...
So yeah, it's worth the money...
To answer your second question - if you find a simple set of instructions please share them here. VEPro is complex, possibly more complex that it needs to be, definitely more complex than I need it to be<G>. That said, one day I may really enjoy all the features.
Honestly I'm still learning! If you are using it on a single machine holler and I an share what has worked for me.