It will work as a VSTi if you already have the midi track, but the Drag n Drop don't work because PG have not fixed the problem YET where you drag a midi type "0" file into the track it will delete the existing midi. This does the same with Toontracks EZDrummer EZKeys etc..
It is a PG problem, it works fine in all other DAW's.
So if you would like to use MusicLab RealGuitar you will have to contact PG and ask them to fix the problem.

ML_RG.mp4
ML_RG.wmv