Just putting these here so I don't forget. These are use full texture commands to remove hidden or find texture references.

Texture Cull - use this in log
http://wiki.beyondunreal.com/Legacy:Texture_Cull

obj refs class=texture name=texture name - use this in log
Find texture references.

Q - click on texture in the texture browser and hit Q
Removes the texture completely and replaces with default texture. I use this when texture cull doesn't work.