If your company will allow it, the 80/260 or 90/270 degree is a 'quick and dirty' that works well for the reciprocal of the runway you did the approach on. If you wish do do it gear down, proceed as for a normal straight in landing - ie gear down, approach flap. At circling limits, add power to maintain altitude, track down the runway centerline visually to the threshold and commence a rate one right turn to 80 degrees off your heading. Upon reaching that, crank in an immediate left rate one turn. If you've done everything right, when you hit 260 degrees of turn you're on final.
Next time you're in the sim, try it to find out if you need to use 80 or 90 degrees in the initial turn - thus 260 or 270 degrees to put you on final. For some reason, Gulfstreams needed 80/260 and Fokkers 90/270 degrees for it to work properly.