I'm new to this game and have been making a few maps to play on. I think some of these maps might be good for inexperienced players to try out, and maybe even experienced players might have some fun on them, too. However, I'm having trouble uploading the .galaxy file to the WinCustomize website that the Sins website directs me to every time I try. 

The trouble I am having is, if I don't include a .jpg screenshot along with the .zip file containing my .galaxy file, I get told I need to add one for the upload to be completed. Then, when I add one, I get told I need to add my 'skin' file, whatever that is. 

Can anyone help here?

Cheers!