Another easy one, but slightly more long winded to explain.
Create your chopper and your group.
Use the WP tool (F4) and place the mouse over the chopper till its name appears, double click to create a WP for the group (careful not to select the chopper). In the WP propeties, change the type to a Get In WP.
Now Select the chopper, again create a WP, this time very close to the chopper (not required to be on it), and make it a Load type.
Now use the synchronisation tool (F5) and drag a line between the two WPs.
Now create another WP for the chopper to land at. Make this one a Unload Transport type WP.
If you want to specify the exact place you want the chopper to land you can put in a heli pad, these are empty objects (see previous post about empty objects) and come in two type, visible and invisible, the only difference is that one can be seen, the other not (guess which is which!)
Technically this is enough to move your troops and have them get out at the other end.
But just for neatness, go back to your group of troops and make them a WP over at the place you want them to get out. Make it a Get Out type and again use the sync tool (F5) to draw a line between the choppers unload transport and the Get Out.
Now you can carry on each units WPs to where ever you want. The troops can run off in one direction to die, and the chopper can fly back home and have a cold one.