Filename = (Name) (Front or Rear) (aaaaaa) Tx (bbbbbb).png,
e.g. "ChildrenFrontaaaaaaTxbbbbbb.jpg"
- - where (Name) = descriptive file name e.g. Music, Warm, etc.
- - where (Front or Rear) = Front for front covers, Rear for back covers,
if missing, cover may be used for either front or back
- - where aaaaaa = recommended spine color code (six digit hexidecimal number)
- - where bbbbbb = recommended text color code (six digit hexidecimal number)