chatham,
who does all that you think on the freighters? The 757 PF is configured exactly that way already with a new crew door cut further forward, a solid bulkhead behind it, and a lav and galley more or less in the cockpit. 100s have been built and are successfully flying with a 2 man crew. Who pulls the UPS pilot out of the controls?
Any of these aircraft can be flown by one pilot in the even of incapacitation of the other pilot. Are you saying that UPS is unsafe? How about all the other freighters out there?
It is the only long term answer. Infact all 757s delivered tomorrow could probably be in the PF config with the windows and seats reinstalled behind the solid bulkhead! It seams that 757 could be arriving at the airlines in no time at all properly configured.
Cheers
Wino