GiMP and high-res texturing-GiMP-Users only please

[Feuer Frei!]

Greetings Earthlings

Anyone proficient with Gimp? And producing high-rez textures?

I'm into my second week producing and working on mods for Skyrim, and am looking at making re-textures and outputting into high-rez.

There is a plethora of material out there, and i've bookmarked a lot of it, the only thing that's sticking so far is that producing high-rez textures is not that simply.

Using high-rez photos and cloning is one way to do it.

I'm looking at 1024x1024 and 2048x2048 texture-making.

If anyone could run me through some step-by-step basics i would appreciate it very much.

Note: not needing help on extracting and opening of texture files thank you.