The former Manchester City striker took a Crosas pass and drove down the right flank, leaving centre-back Frazer Wright trailing in his wake before cutting in to the box and drilling the ball past Combe.
Burley introduced winger Finidi George in place of defender Hreidarsson in an attempt to give his side some fresh impetus - and Darren Bent should have done better when drilling Jermaine Wright's centre over the crossbar.