this map has got some nice atmosphere... could use some less regular rock formations, and some more detail in places, otherwise cool!

Yupp I like it too, you´re improving, staffy.
It has less of a "copy and paste" feel to it, as your other maps had.
Indeed a little to squarish still in some places, and still some of those rather random indents you like to make here and there, but definately on the right way :)

The skyboxes are really nice.

I have dowloaded, extracted, but do not know the address to open the game?

I find your map is very pretty, BUT the skybox are really good !
Are they copyrighted ?

really! but it's missing a few jumpers, weapons and more spawning points. i didn't like the sky at all too dark and unnatural. why not make it a clear winter sky and buggerer the authors to add snowing? :)