using mq2allzone found in the redguides compile you can use /lockazone and then dropping the task, this keeps you in the task for about 15mins (if no one with task is in the zone) and if your able to GK the raid mobs in zone you can do this without a timer now. (for this method you can use a lv1 toon to hold onto the task while your lv70-75 toons are getting the loot, then delete the toon afterwards).
another method is kill the raid mob, and just before the mob dies you drop the task and zone out, have 1 person in zone take the timer, but then add in everyone afterwards for loot. (for mobs with chest loots, you wont get the timer unless the chest is opened and your still in the task/zone)
not sure if this is what the person means, but this is what i made out of it.