I put together a comprehensive list of cheats (both working and non-working) in my FAQ.
The one you're looking for is "mpasscam".
I was surprised in all the FAQ's, no one even mentioned the Screen Shot Key?
I had to search this forum to find it.
Good job admin.
Like cirlin said, Google search is your friend. The info is out there, and I just gave you a link to what you were looking for.
There is a way to get a 3rd person view, but the character model has no animation so it's not really a playable view.
The Killer App Mod makes the model animate, but it's still not really playable as you said. The game doesn't properly allow you to use your weapons in third-person, yep. Something to try and get working in the next version . . .