I ran Matt Colville's Delian Tomb for 8 scouts last winter.  It took a little more than 2 hours, so you could chop some out and fit things.  I found map printouts online and other advice for running things.  It was fun, but chaotic. 
I ran initiative by having everyone roll, take the highest to go first and then go around the table. 
Premade PCs with cool powers printed out along with spells.  I highlighted in different colors things like HP, AC, and base attacks to make things easier.  I did swap a few 1st and 2nd level powers so a fighter had extra attack and the other has second wind.  I kept to the basic classes and had the casters with only a few spells printed on another sheet, but each had a slight different flavor.
One thing the kinds liked was to have a paragraph on the character's personality.  One of the mages was a snooty know-it-all and liked to use big words to make him sound smarter, and one of the fighters had a cool shout every time he attacked- the player chose "Cowabunga!".