When creating you WAD information file, include the standard information,
plus the following at the top:

RPG WAD - v0.9

And the following at the bottom (filled out!):

Charector level(s) intended for:
Version of spec used:
Layering:[should be as follows - Layering: RPGBASE.WAD {wad1}.WAD {wad2}.WAD...]
Approximate gainable experience:[on average]

Note: The words in the square brackets are just CLARIFYING STATEMENTS. Do not
      actually include them in the information file.
