I WANT TO MAKE SOMTHING

[U.F.O]

how do you make an addon? whoever tells gets a 

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[BlutEngel]

Use notepad or something like that for scripting.
Use Milkshape, Blender or an other modeling program for modeling.
Use Quark or Hammer for making .dif files.

[U.F.O]

OK HERES YOUR COOKIES