Ok... It's alright to change it. It's for the mod Stargate TC. You may change it as much as you wish. However, I have a new problem now. I fixed the teleporters and stuff, now I'm getting a weird copile error. It says "Too many direct lightstyles on a face (?, ?, ?)" about 400,000 times. I pasted the compile log into a text document and it was 7,901 pages long and 19.98 mb. I know you don't have the wads but I don't think the textures matter for the problem. Thanks for the help.
Thanks anyway.