Hmmm,
If the cas is aligned then the car should at least stay idling, unless the cam is a tooth out, but you're happy you got that right. Is there a way you can bypass or switch off your Unichip? Just to test?
Also I dont think the lifters would have drained by themselves unless you cycled the motor alot, that might have pumped the oil out, but lifters are easy to fix and they dont make the motor "not run" so concentrate on the running problems first, worry about lifters later.