Well I'm having quite a hard time to understand what exactly the different input stuff should be used for,
basically I would like to ask a more detailed question, but since I have not really understood anything of it really, can someone maybee point out some Tutorials, example code, or similar?
There are test classes for all sorts of things that come with the JME source, look for ones to do with input, check the source to see how things work.
Go through this tutorial(JME2 but there is also a tutorial for JME1)
http://www.jmonkeyengine.com/wiki/doku.php?id=the_tutorials_-_jme_2
and type 'input' into the wiki search or forum search.
Ask in the forums if your stuck on stuff and the guys here are quite helpfull.