If you a texture wad file, then go to... (any SIERRA Folder)... example:
If you want Half-Life wad files (textures), you go to somewhere like:
C:SIERRAHalf-lifevavlewadname.
Wads must always be in a "valve" folder, or else the game will crash.
Counter-Strike textures would be:
C:SIERRACounter-Strikecstrikevalvewadname.
TFC textures would be:
C:SIERRACounter-Striketfcwadname. (exception with the valve folder thing)
or
C:SIERRAHalf-Lifetfcwadname. (once again, and exception.)
Help ya a bit?
Your tfccounter-strikehalf-life whatever games are NOT in your VALVE folder. They are in the SIERRA folder. (read the pathnames I gave you
)
Wait... Alien answered your question... I think... About just your 3d colored line thing. If you're saying you can't find where your textures are, than this is one I am saying 
[addsig]