Hi !
Well ... you could use a convolution engine (Cakewalk Perfect space, or SIR2, or Waves IR1),
then load up a convolution that emulates the room you desire...
For my part, I've found an impulse of Auratones speakers that I use a lot.
You can look out on the web for lots of convolution files (usually WAV files), you'll find mostly reverbs, but there are some for speakers too,
and some gear as well (guitar/bass cabs etc..)
You probably discovered this VRM because of Musician's friend SDOTD. I checked for some reviews and demos,
and I don't know ... sounds a bit like a joke to me... I'd be curious to try one to convince me it's actually worth something paying for.
I hope that helps !
Cheers !
V