Do you mean that you cannot find the texture list, or that the textures are missing?
In case of A, the texture list can be found in the frame just below the 3D window, if using the one-window setup, or it can be found by pressing T, if in four-window view. Look to the list in the left of that window; if you see names such as "atcs", "arachnid2", etc; double-click one to bring up a list of textures.
Sorry I can't help more at the moment; I don't have Radiant in front of me.
Good luck!