Is it possible for somebody to make a seperate download for Sandbox editor ? I don't want to download whole SDK just to get Editor. My internet connection is definetly to slow for that :/

There is a lot more stuff than just the editor, extra sample materials/level/content creation examples/plugins and tools.
And those re-distributable libraries so you can run the editor if you don't have them.

I believe it will be on torrents or file-sharing site(fileplanet and such) near your location.
Just leave it on and wait. In the mean time just make sure you have 64 bits OS.

Still, I would like to have an option to download Sandbox editor seperatly.