Hi,
The first thing you'll need to do is get JSGME, which you can find in the SH 5 mods workshop forum. This is a program that will let you install and uninstall mods easily.
Next some good mods, You'll definately want TDW's UI mod, which adds loads of functions to the game and is basically essential. If you are new to mods and just want to get started quickly then try TDW's Magnum Opus, it's a collection of other mods setup to work together and is also really good. You'll also want Open Horizons 2, it improves the campaign and is really good. These are all absolute essentials that really make the game better.
On top of that you will probably want; Dynamic environments, which makes the game look better; IRAI, which improves the enemy AI and TDW's FX, which is really cool too.
There are plenty more, basically just look in the mods forum and check out the mods list in some some of the user sig's, thats what I did. It's a real friendly community so if you get stuck someone will help you.
Good luck
