The "Extras" directory contains the following files:

!!ReadMe       This file
StyleGuide     The standard icons that are listed in the RiscOS Style
               Guide
SaveWimpSpr    Small Basic program to save the sprites in the Wimp
               sprite area to a file; sprites from the ROM and RAM
               part are saved separately
Sprites2D      Sprites file to replace the default (3D) sprites file
               if you want to use TemplEd with windows in 2D-look
Templs2D       Templates file for the same purpose. To get 2D-windows,
               rename the files "Sprites" and "Templates" in the
               TemplEd application directory, and replace them with
               copies of "Sprites2D" and "Templs2D"
Use2D, Use3D   A couple of small Obey files for easy switching between
               standard and 2D templates