From the Hero Games website:
Character Pack for HERO System 6th Edition Core Books (Character Creation and Combat and Adventuring). Includes all sample characters from those two books. For Hero Designer Software.
Hero Designer is a piece of software that greatly simplifies the creation of HERO System content by providing templates, error-checking, and a full set of powers, skills, etc., and more.
Hero fans (usually uncredited) volunteer to turn content from HERO System titles into Hero Designer format. No artwork is included in HD Character Packs.