I have a remote start on my 6-sp GT-S, and I think all remote start will work on manual tranny car, you just have to find a guy who knows how to install it. As for safety issue, the one that I have is bought from BJ's, it's like $60, piece of crap, but it works, and here is how to safely start your car.

Step:
1: b4 you shut down the engine, you'll have to press the start button on the remote. (this will keep the engine running even if you take out the key)
2: Once it's been pressed, take out the key, at that time the engine is still running.
3: Get outta the car, shut the door, press that same button again, then the engine shut down.

So the third step is assure you that your tranny is in neutral position, coz if you left it at 1st, you can get out with the engin running!! And if you don't do this procedure, you cannot start your car remotely next time, unless you manually disable this feature.