Steve,
I'd like to guide you to an older threat here on RTMM including my opinions on some helicopters.
Here's the link:
http://forum.mistymoorings.com/index.php?topic=829.0Besides the Nemeth CH-54 from the same company there are the AS350 and AW109 with winching capable versions.
The Nemeth/ Milviz CH47d Chinook has a slingloading hook.
But you need liftable objects to use these capabilities. Means you have create a special mission or read my comments later regarding slingloading.
Did you already try the following freeware helicopter?
Hovercontrol Bell 412 EP and
H & S Design EC 135
Both heli's offers nice options and equipment. Especially the H&S EC135 dystem depth is way better than the Nemeth EC135.
Regarding slingloading:
Do you know the fsx addon AIcarriers2? It's used for adding ships in realtime into FSX.
But you can configure it for also adding liftable heli objects into any FSX.
Normally you would need a special designed mission or a soecial configured heli like the SA315 from Peter Salzgerber. But with a preconfigured aicarriers2 you can do slingloading with helis just from a saved flight Status.
With aicarriers2 I love flying resupplies to the CIRP stations or doing helilogging with the CH47D at RTMM locations like Dora Bay Logging station or Labouchere sawmill complex and Norandex Mine.