Sorry to interrupt what will prove to be a very useful and detailed tutorial... one of the mods perhaps can delete it later...
one critique note: perhaps explain at the beginning what programs you intend to use to produce the atlas... I'm guessing that FT is Fractal Terrains and Illustrator refers to Adobe Illustrator... If i'm wrong, i'm going to feel really dumb.
I have photoshop and FT but I don't have illustrator... can you explain what the Autotrace button does (again, i'm assuming from the name that it auto traces what you have selected) and for those without Illustrator... perhaps an alternative ... and barring that... what would one have to do if they had to do it by hand... i'm guessing (again, i do that a lot) that it would require some lengthy time consuming task for the very reason an auto button was made...
Del