TightSlot
On a normal, 4-engine take-off, the aircraft is certified to lose the power from one engine. As TopBunk says, there are no guarantees after the falure of a second engine until the aircraft is clean. However, on a 3-engine ferry the take-off weight is vastly reduced so as to allow a second failure at an earlier stage. The aircraft is climbed to 400 feet and then flown level while the flaps are retracted. So long as the speed is above 2-eng VMCA then there is no problem with losing two on the same side. During the training on the somulator the small group of pilots who are ferry qualified practice the failure of a second engine just after Vr.
BOEINGBOY1
Those photos were shown on PPRuNe. I believe that they turned out to be a hoax.
Airclues