Okay, for starters you keep saying "file" when you mean "folder". A file is ONE thing, a FOLDER contains one or many FILES.
http://www.trainsim.com/vbts/showthr...er-for-dummies
Best way to start at the beginning is to learn basic computer operation and file/folder management so you're putting your car in the garage instead of trying to stuff it in the freezer.
Download JSGME here;
http://www.subsim.com/radioroom/down...o=file&id=4333
And there's a user guide here;
http://www.subsim.com/radioroom/down...o=file&id=3814
If you intend to install and uninstall mods of any type, that is the beginning, so you might as well take time out and learn to use JSGME.