This thread is an extension of this one : http://rmrk.net/index.php/topic,48461.0.html
All my tuts will go here. For now I've only got the one, and it's not explained but I'll get to that later.
A very rough idea of how to put patterns on your tiles.
Basically, take your image, make it bigger, paint the shiz out of it then shrink it back.