My own Personal Boxed Set (which does have its own box!) consists of six booklets:
- Character Creation
- The Basic Rules
- Magic Rules and Spells
- World Information
- Monsters and Treasure
- Compiled Tables
I have put my rules in digest-size PDFs, and use booklet printing to crank out copies, using my long-reach stapler to put them together all old-school.
While I was at it, I printed out my PDF of the Esoteric Creature Generator to throw in the box, as well as a copy of Matt Finch's Eldritch Weirdness and his City Encounters PDFs, also in booklet form. Add some dice, some pencils and a small notebook, and I have box of portable game ready to play.