Hi,
I found a fantastic tool for the helo guys called SlingOperator.
Configuring slingloading for helicopters in FSX is not an easy task, with SlingOperator it's so much easier.
Normally you need a predefined mission in FSX or saved flight with a manually edited file.
SlingOperator is gauge which allows you to get the sling and winch working not only in freeflight condition but also edititing the length of your cable while in Flight.
Used In combination with The tool AIcarriers, which allows placing liftable objects for slingloading, in freeflight SlingOperator this is fantastic addon.
The Link:
http://frenchvfr.free.fr/download.php?lng=en&dirdnl=no&tconfig=0&id=2See there under FSX Gauge - winching gauge