I fly helicopters quite routinely on FS2004, and one thing you must know is that unlike a fixed wing aircraft, you cannot just let the controls go and expect the helicopter to keep doing whatever it was doing. Choppers are inherently unstable, and when hovering, they require constant, small corrections with both the cyclic and the collective, as well as the pedals, to keep them in a hover. Helicopter flying without an autopilot requires that you be on the controls at all times!
Also, when hovering, it is going to be much, much easier to hover directly into the wind, because if you have the wind at your tail, or to the sides, the helo will try to "weathervane" into the wind, thus requiring more corrections and an increased workload over what you normally need to do while hovering.
Flying helicopters in FS is also very challenging because unlike real life, you do not have your peripheral vision and other minor visual and physical cues to help you along in slow helicopter flight.
Mastering helicopters in FS is possible though, but just remember that it takes a lot of practice!
I would also ask around on the
www.hovercontrol.com forums as well for pointers from their experts.