After about 25 min of driving, ther car will just die and wont crank unless I let the car cool down for about 15-20 min. Sometimes in the morning, it'll crank several times and then finanly it'll start up.

Could it be the over voltage regualtor - even if the production date on the regulator is march 2000. its a new part.

Could it be fuel related? But isnt the fuel relay built into the MAS?