To get helicopters to hoovering almost like real ones, you have to use Heli2009 of Flight1. The bad point is, that heli traffic can't be followed like other aircraft shown with Traffic Toolbox. Positively said, all helicopters can be used, and there is no need to create separate Afcads. It works from any place you want.
That's an example using Heli2009:
Once there was a Mil-8 which hoovered at beginning of the runway, flow at low altitude over the runways for about 1000 ft and then took off.
Bernard