After five minutes Cameron Park took advantage of some sloppy defending to pick up a loose ball and score.
Porritt got on the scoresheet on 37 minutes when he picked up the pieces from a goalkeeping howler and hammer the ball into the net.
Franks went close not long after the break but hit the post, leaving a simple tap-in for Gary Martin.
Boro hit the woodwork when Park let fly from 20 yards.
The fourth goal came on 68 minutes from substitute Daniel Hawkins. The 17-year-old scored from close range from a cross.
BORO: Jason Steele, David Atkinson, Ashley Corker (Philip Shead, 68) Bruno Pilatos, Richard Smallwood, Emanuel Pogatetz (Patrick Otte, 45), Nathan Porritt, Shaun Saiko (Daniel Hawkins, 52), Jonathan Franks, Gary Martin, Cameron Park.