[Cairenn]

Okay, back to basics. Using CT_BarMod as our example. Your path for it (and the accompanying files) should be:

C:\Program Files\World of Warcraft\Interface\AddOns\CT_BarMod\CT_BarMod.toc

The folder name has to be the same as the .toc.

By sub-folders we mean that some mod authors put their zip files like:

Interface\Addons\CT_Bar\files

or

Addons\CT_Bar\files

or

CT_Bar2.3.1\CT_Bar\files

etc

See what I mean?