Ghost Recon: Future Soldier Cheats
The UAV can be a little bit awkward for a mouse and keyboard setup because you have to use the up and down arrow keys to ascend or descend (I'm probably wrong but I don't remember seeing any option to rebind them).
I know the mission you're talking about and it's definitely a big showcase of what the UAV is capable of. Take your time, scout out areas and move slow and pick your targets. It's possible to complete the mission with literally about 6 kills to your name.
However, it's also one of the missions where going in guns blazing is also a good tactic and can actually make several parts of the mission a bit easier.
If anyone wants to hop on a Ventrilo server and play co-op with me, just for fun or if you're stuck on a particular section then PM me and I'll let you have the details.
I only just found out today that you don't have to press 6 (default) to launch the Drone and you don't have to use the up and down arrow keys (default) to control it. If you select it with the mousewheel, like you would a grenade then press G (default) you can launch it that way and then use the mouse wheel to raise/lower it. You still have to hold 6 to recall it though.