Problem loading After Glow textures

I downloaded these (link at bottom of post) Celtic textures from After Glow, and merged them with my map using XWE, but for some reason they don't seem to show up in Doom builder. Is there another way to get them to work? Like renaming them or something? I'm really not familiar with adding textures and shit to maps, if someone could please explain to me?

http://www.doomworld.com/afterglow/textures.shtml

If you want to merge an entire texture pack, I recommend using Exl's excellent little doohickey "wadmerge"

link: http://www.teamhellspawn.com/exl/?page=wadmerge


[edit] and I am sure that this goes without saying, but always make backups. :) [/edit]

Provided you haven't deleted the PNAMES and TEXTURE1 lumps, they should show. All the texture names start with C.

Thanks for the replies, when I get back from work I'll try it out again.