a RaR file that was supposed to be a mod, the Dynamic Combat beta ( or something like that) by Mansh00ter- that is the RaR file im refering to
Right folder, all you need to do is then unpack the RAR file using either Winrar or 7-zip to gain access to the mod folder that you are looking for. They usually do it this way so that large mods can be downloaded faster as they are compressed into smaller more manageable files. 7-zip is the now the generally preferred choice for mods here as it is better at compressing large files to small ones than Winrar.
Also watch out for mods that are unpacked within folders themselves, meaning sometimes when you upack them the mods are inside another folder for example:
Entrenchment 1.02
Mod name
Mod name
GameInfo
Meshes
etc...
the structure should always be:
Entrenchment 1.02
Mod name
GameInfo
Meshes
etc...
in order to see and activate a mod.