A friend and plenty of flash grenades are required. The rocket launcher is also recommended because Jill moves around a lot. When the fight starts, Jill will jump down from the balcony. Just as she lands, hit the ground near her with a flash grenade. Don't hit Jill directly because a flash grenade can kill her. She will be temporarily blinded, allowing your teammate to restrain her from behind. Run up to Jill and shoot the control device, but do not attempt to pull it off just yet. Depending on the difficulty setting, do this four to six times, then attempt to pull the device off. Use a high powered single shot gun when shooting the control device like the PSG-1 or any Magnum, as it will help speed up the process.