So sorry...noob question!

I'm so sorry to have to ask this question. I feel like a complete mid-life dimwit, but I, for the life of me, cannot get a MOD, any MOD to install!
I've only just recently got SH4 and fancied trying out the TM 1.9 and the MOD that makes the sea look awesome (sorry cannot remember the name of it)
I downloaded generic MOD Enabler and to be honest, have no clue as to what I'm meant to be doing next!
I know, I know, what a thicko, but hey ho, we've all got to learn somehow.
So please, show some compassion on a fellow shipmate and let me know in the most basic way you know how, what I need to do to install these great MODS.
Thanks in advance
Cookieguy