I found this to work perfectly for the (gs) Gridserver plan. I think I remember seeing something a bit different for the (dv) Dedicated plan.
https://kb.mediatemple.net/questions/63/Creating+symlinks+to+redirect+your+site
The link below is the precursor to the above if you don’t know how to connect via ssh… https://kb.mediatemple.net/questions/16/Connecting+via+SSH+to+your+server#gs