Hi, all needed modules are compiled into the simpad linux kernel (if i remember right). I am not shure about the /dev/ adress- I will look at it as soon I find some time. More information about kbdd can be found here [1]. If you get into trouble just ask here again - next week I will have more time to explain it a bit better.
If you are able to use the keyboard please wirte it (althrought how you did it) on the wiki [2] .