That's the only way to play.

But those commandos have the same gun as the small security bots and are much more dangerous than any of the other normal infantry guys.
What do you people do when talking to Lebedev in that 747 level? Do you try to save him or let Navarre kill him?
On a side note, there is actually a bug in this area; go outside the plane and into the hangar, hit one of the NSF guys or the bot with a knife or something (which gets them mad) and then run over to Paul. At some point he will hear the shots or get hit by a stray bullet from them. Because he heard them shooting but not you, he thinks they started it, so he attacks them and eventually kills all of them, including the bot. He then chastises you for killing them when he did it himself.

Does anyone pay the fee at the Paris nightclub? I never do that, but instead just fire a shot near the doorman, which causes him to get scared and start running around and at some point he opens the door for me, so I can just get his key for free. He gets mad at you when to leave the club but is too wimpy to fight you or anything.

Also, has anyone seen what Hermann does if you free him from the cellar in the first level and give him a pistol? He fires it at the rate of an assault rifle and absolutely never misses. You can actually do some funny stuff in this level too by getting either him or Paul to kill many of the guys for you; once again, if Paul hears any shooting, he gets angry and goes after the disturbance himself.