Crymod.com have a large number of tutorials avaliable for anyone interested in getting into map creation / editing, some are better than others, some have videos attached others are text based.

Here is one that is reasonably good and essential veiwing for anyone who is planning to make a PS map.
Power Struggle Tutorial

If you find any other good tutorials please add them to this thread and include a basic description of what the tutorial is about.

here are some useful begginer video tutorials

this is the link to the first video:

https://www.youtube.com/watch?v=v3YPbK3hGKw

I would reccomend these tutorials. DONT do what i did and try to figure it out by yourself (i managed to do it... just)

Earz