1) Theatrical version preservation:
Fake trailer opening
Theatrical cut of PLANET TERROR
No credits after PT
Fake trailers intermission
Theatrical cut of DEATH PROOF
Credits for PT and DP at end
2) Exended theatrical version:
Fake trailer opening
Extended cut of PLANET TERROR
(PT credits as an intermission? Since it *will* be substantially longer)
Fake trailers
Extended cut of DEATH PROOF
DP credits (or both if no intermission credits)
3) Fan-edit cut, as andy_k suggested.