Skybox Question/Errors

[JenniferOrange]

I'm trying to make myself my own skybox. I downloaded a nice picture I wanted in cube map form from cgtextures(dot)com. I've been following the wiki's outdoor environments tutorial, too!http://wiki.frictionalgames.com/hpl2/tutorials/level_editor/tutorial_3?s%5B
I have the .dds plugin, I'm running Windows Vista and Photoshop CS5 (full version) and when I try and save, I get an error that says:
"Need six images side by side and width equal height."
I'm not understanding what it means. I don't have the JPEG split into 6 images, it's in it's cube map form with all six pictures together. What do I do?

[palistov]

Try making sure the dimensions are a multiple of 2.

[JenniferOrange]

They are; I've put in the suggested 8192x1024.

[DRedshot]

you might want to try 1024x6144, because although 8192 is a multiple of two, it is not 1024x6

[JenniferOrange]

DRedshot you are a magic genius, it worked. Thankyou!