You can take any of our waypoints and modify them for your own personal use. Re-releasing them, however, is a no-no, unless you get the original waypointer's approval. Having several variations of a map floating around is sure to cause confusion, especially if errors creep in.
I learned by starting with a simple map and by extensively studying the works of the senior waypointers and asking a lot of questions. Study both the RtCW tutorial and the ET Wiki for basic instructions.
Waypointing is a great hobby (and time-eater). Enjoy!
