Yes, it is an add-on to MS Flight Simulator. You can read a description of it on
http://shop.benchmark-avionics.com.
It is still evolving. Now that the basics are done, I plan to add VRS, some blade slap sound effects, and some other cool things eventually if there is enough interest.
Right now, the main thing it does great is allow you to start like the real deal. But for some reason, it is my favorite helicopter.
Patrick