Spanky:
Unfortunately theres a problem with that.
Godspeed also gave me the tileset 2 years ago to use on Enigma Graal.. but the artist who made them (Ivie) was using them for her server, Terra.
Unixmad, Stefan and the GM (at that time Nemesis) all decided that the creative rights for something returns to the artist after a playerworld goes if they choose to use it.
I was forced to take down the tileset.. and then I was even fired by a corrupt Nemesis for still having it in a temp directory in my FTP -_-'
So.. you cant use them without Ivies permission unfortunately :-\