I would imagine the 767 is no different to any other large multi engine aircraft:
<V1 stop on the runway, then the memory items
>V1 continue the take off.
When above 80kts, you tend to only stop for major problems, engine fire / failure, etc.
If i remember correctly, RTOs are calculated with both / one engines at Idle / wheel brakes only if its a dry runway, or brakes / reverse thrust on one engine with a wet runway