searching for the command too select all faces that have a certian texture.
i know it can be done but forgot it…
u go to the texture pain and select a texture then hit something that will select brush faces in entire map that have that texture…
cause i just ported my map over into et and have alot of textures that are not transferable and need to be caulked and repicked…
so i stay legal lol… 
go to textures and then find/replace
then u get a bow with 2 empty lines in it
the top one is the texture u wanna replace
bottom the replacement
make sure the top bit is chosen and chose the texture (the faulty one) in ur texture view box.
Now make sure the replacement line is picked and pick the texture u want from the textures view box, then hit ok
Textures should change to the ones u want now.
gl 