Have you tried pairing the two VM remotes you do have to the same box to see if it can be done.
Apparently it cant be done but I haven't tried as I dont have the need.
What i was able to do was pair my LG remote aswell as the VM remote, so that at least proves dual pairing of different remotes is possible.
If you can pair the 2 VM remotes successful then its worth asking VM Or perhaps buy some smart remotes. There is a thread on pairing the harmony smart remote in here.
Equipment;
HUB4
x2 V6 Upgraded to tv360
Ultimate Ooomph Gig1
VM Telly Tablet