Here is a little mission(Right clic save as) I made on South Asia. The aim was to learn using the new TOH command for SlingLoad and by the way have a great little training.
Now with the Blake's Sling Loading I guess we could do it better and better !
Edit : Don't forget to instal this mod to be able to see your load
Oh and try to add " this animate ["BenchL_Up", 1] " in your init line it's cool for this kind of mission with a Bench equiped chopper.