Since all the old guides are outdated, and ppl dont know how to do it, or get the programs needed, im writeing this guide on how to add new adts, and ofc provideing the tools. And if you dont know how to use MWS, dont do this.
Download SWG's wow map editor(made for 2.xx wow): SWG's map editor
Download Cryect Tools: Cryect Tools
Start by extracting the WDT file useing Mywarcraftstudio.(The WDT files are placed in common-2.MPQ) Just follow the pic :P
I choosed Azeroth's WDT(world\maps\Azeroth\Azeroth.wdt), and extracted it to your *wow location*\World\maps\azeroth(or region name)\ (Same place as noggit saves ADT files.
Then open SWGs map editor, and choose the file you just extracted(azeroth.wdt)
Now a window pops op, its rather simple and explanes it self.
When done, save it as same location as it allerady says. And then close SWG's editor.
Now extract / find some adt. Copy it, and place the copyed adt in *wow location*\World\maps\azeroth(or region name)\ and rename it to where you made a new adt,(Keep copy/paste it until you got enugh.) ect. I made new adts from 1,1 to 3,3 on Azeroth WDT. So i have to rename my files to:
Azeroth_1_1.adt
Azeroth_1_2.adt
Azeroth_1_3.adt
Azeroth_2_1.adt
Azeroth_2_2.adt
Azeroth_2_3.adt
Azeroth_3_1.adt
Azeroth_3_2.adt
Azeroth_3_3.adt
When done copying and renameing your files, keep Azeroth folder open, while opening Cryect tools, Drag and drop one at a time one of your "new" adts over Offsetfix.exe.
Go to noggit, and enjoy your new continent First guide ever xD