Here's something for you to play with. Extract the zip file to your paintball2 directory, and your flames should appear like the attached screenshot. It could look really nice if we had a better texture. It should be fairly obvious what you can do to adjust the script. I'd remove the scale parameter and scale it up in the editor, personally -- that way the script has to do fewer things. You might play with the scroll speed as well.
To make sure people download the file if it's available on the server, you need to add "requiredfiles" to your worldspawn. For the final version, it will be "requiredfiles" "scripts/maps/anubis.txt"
Also, you can't use r_metal1 anywhere else, or it will look like the flames.
Tip: To select all the flame textures, you can do Edit|Select|Texture in BSP and put in pball/r_metal1 and it will select all of them. Then you can scale the texture in the surface parameters and hit apply brush to apply it to all of them at once.
I didn't really get the chance to do a full run around the map -- only thing I noticed, though, was the ramp to the flag in the base -- I'd use just a plain wood texture for that, not one with planks. It doesn't make sense to have a single board made of planks.