Cheers all.
Davy07 - there are lots of people better equipped than I to tell you all about the HC3, but I believe it's based on the MH-47E airframe.
As for desktop pics, I'm afraid I'm reluctant to share them any bigger here. It's not unheard of for commercial organisations to make the most of such opportunities! Sorry.
Here's the rest:
"Ragtag" (I think)
"Gauntlet 64"
"Gauntlet 26"
"Tester 09"
"AA223"
and one more for the crewman of "Gauntlet 66" (apologies about the quality)