Hmt3.5 dont get it

[Someone]

i open up the map files but when i try to load a mod i cant find where to do it i open my map files on it then im stuck i have a mod downloaded that i want

[Zimdale]

umm actually you arnt supposed to open the map file yer supposed to put it in yer map folder. I think lol least thats wut ya do wiht trial mods