Hi there! I am switching from my skybox to a skydome. The problem is that I have lovely textures I made with Terragen (Up, left, right, front, back, textures) and I want to use them to create a single texture I that I can use to map to my skydome. How can I do that?! Thanks so much! Cheers! Rod

Not so difficult.
The skydome texture is simply one texture of the sky.
Probably best to take your pic of the top of the skybox and use that.
The maths to render the dome is more complicated and you'd be better speaking to a programmer to give you a demo app.

Going from dome to box is easyish but not recommended as you'll be using the same texture for left/right/front/back/top/bottom:

Get you tex - use it as say the front and back.
Use photo edit tool -> mirror for left,
mirror for right, rotate 180 for top,