A (really noob) Question

[LoveBlaze]

Okay, so this question may seem a bit idiotic but I'm completely new at setting up a Dev environment, and I've been using the tutorial on the wiki (this one) which I assume is correct. I'm just confused on the final step, where it's saying to point to which map file to load. I get that it's to load a map and everything, but I don't already have a map file? I just need to know what to set that to. One of the original maps from the official game? I don't want to mess anything up with the game itself, and I feel like that would overwrite the original file or something and mess with it. Then again, all the knowledge I have comes from VERY minor roles scripting projects in the past and what you could gather from tutorials.

Also, any tips you want to share would be great. Show off your knowledge to an almost complete novice!