In my opinion, he want us to explain how to make a different version of the original map(duh mods!!!
I don't personally know how to directly mod, but if you "want more v2 maps", here's what you have to do:
1) Go on the map you want, download it and save it on a place you know it'll be there(like a new folder in the "maps" folder).
2) Extract all files through the "maps" folder(open the zipped folder, press "extract all files", put the destination to MyComputer - C: - ProgramFiles - MicrosoftGames - HaloCustomEdition - Maps then press extract and wait until it says it's done(it can say "unrespond" or something as this, don't worry and just wait).
3) Load halo CE and you should be good to go!
If you ever want to mod, then maybe someone else might want to explain it. Or I'll do it if you want.