You can convert Quake textures to HL using Wally. (can't remember where to get it...). It can load quake/hl textures and save them as quake/hl textures. I've done it before infact and I might still have the textures I made from quake for HL if you want it
although some textures wouldn't work due to bad filenames for HL textures.
edit: infact, I found them, I'll upload them to the filebase!
here we are!
http://filebase.bots-united.com/pafi...on=file&id=200
I think no-one else has uploaded the same to the filebase so I did since I think you are looking for them.
