Hmmm..
Come to think of it, this is the Conti we're talking about, it may be a bit different but worth a look.
As for the fuel rails, the only way they can vaporlock is if the fuel pump / fuel return is somehow failing. If the rails are always full there can be no vapor.
Have a look at these nice tech articles on another board to see if they might apply to your situation.
http://www.lincolnsonline.com/article15.html
http://www.lincolnsonline.com/article23.html
http://www.lincolnsonline.com/article59.html
http://www.lincolnsonline.com/article17.html