Here is the Boeing circle to land...
(737-300/400/500 Both Engines Operating)
The circling approach should be flown with langing gear down, flaps 15 and at flaps 15 maneuvering speed.
Maintain MDA (ALT HOLD mode) and use Heading Select for tracking. The Circling must be excecuted at or above MDA and Visual contact must be maintained at all times.
Prior to turning Base leg, select landing flaps and beging decelerating to the approach speed (Vref + 5). This assures minimum turning radius to the runway. Complete the landing checklist. Do not decend below MDA until intercepting normal visual glide path.
Leaving MDA, disconnect the autopilot. After intercepting the visual profile, cycle both Flight Directors to OFF then ON. This eliminates unwanted commands and allows Flight Director guidance in the event of a Go-Around.
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Well, variations will apply depending on company procedures and type of Boeing aircraft but I'm sure they will not differ too widely from the Boeing recommended procedures. Hope this is of some help...