Here are a few shots of Cobras in OIF 1.
For the TOW, the missiles are held into their launchers by a simple support bracket. To reload, a pin is pulled from this bracket, allowing it to swing down. The old tube is removed, and a new one is rolled into the launcher. The support arm is then swung back up into place and locked again. An arming handle must also be pushed down so the launcher makes electrical contact with the missile. It's pretty simplified, but the best way I can explain it:
What kind of Huey shots are you looking for? A Google search will turn up lots of this:
I have some more, but my dial-up connection is dragging me down.
Hope this helps for now.