When I get the mods downloaded, I found the file, so then where do I put it in the folders?

try reading the read me.... they generally have instructions

and if that doesn't work place the everything in data files into the game's data files folder, i know there's already some folders in there with the same name but they wont get erased, everything will be merged.

Oh, goody, I get to tell somebody where to stick it.

http://btb2.free.fr/morrowind.html

There's a tutorial at the top of the list.

http://www.mwmythicmods.com/starting.htm