If you want to edit the game's text yourself, get a hex editor with table support and MEGAMAN_LEGENDS.tbl.  The game's items aren't text so if you want to add something like a weapon or an item, use these numbers.  The list will get bigger when I find more stuff.

 8902548900 - (Circle button)
 8905578900 - (Square button)
 8903558900 - (Triangle button)

 8903D02C89 - Class B Digger's License

 8903D05689 - Ring

 8903D00D89 - Power Raiser 
 D0619B6105 - Guidance Unit
 D0629B6205 - Blunted Drill
 D0639B6305 - Guidance Unit
