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bitmaps
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back.bmp - Background image. Width=315, Height=222. Gray areas are opaque areas which will not be seen in T_SCFE dues to components which block the image. Black areas are actual visible lines in T_SCFE.
exit0.bmp - Exit button normal state. Width=11, Height=11.
exit1.bmp - Exit button mouse-over state. Width=11, Height=11.
icon.bmp - Upper-left-hand-corner Icon bitmap. Width=16, Height=16.
inc0.bmp - Include Menu Button normal state. Width=11, Height=16.
inc1.bmp - Include Menu Button mouse-over state. Width=11, Height=16.
min0.bmp - Minimize button normal state. Width=11, Height=11.
min1.bmp - Minimize button mouse-over state. Width=11, Height=11.
sysicon.ico - System Tray Icon. Width=16, Height=16.
back_trans.psp - Visible background areas in Paint Shop Pro format. Width=315, Height=222. Play with this image as you see fit.

Before editing these, make a new folder under \Skins\ and copy the templates to that folder. Then you can edit them and still keep the templates safe in their own directory.