Ok, so I have a completely new texture that I am trying to make into a sky. It is the right size, and I have read it into the .sky file. What else should I do? Oh yeah, and when I look at the sky ingame, it just shows black. Nothing else.
Thanks.

Easiest way to change the sky is to just take your new sky texture and rename it to what the original sky texture name was then place it in your world1 folder.
You may need to run a Clean before munging in order for the new sky texture take effect ingame.

I'll try that and report back. Thanks Ace.