I have not done this myself yet in BESR8, but knowing the technology for some years now, I am pretty sure you can create a script (VB is most common, but any COM enabled script language will do) that can do this process for you automaticly.
With the GUI in this situation, I guess you should stop using the sv2i files and run the proces with the v2i files directly. Manually you know which RP's should be part of the VMX.
When you script, you can use the sv2i to get information on which RP's should be part of the VMX you create.
Hope this brings you a bit closer to what you want!