I would be surprised if the driveway is more severe than the Hardknott pass, 1 in 3 is bloody steep!!!!!!If the car has ESP, it cannot be switched off. Only ASR can be disabled (Anti Slip Regulation) - this is designed to allow the front wheels to spin if snow chains are fitted.
By the sounds of it, wheelspin is the last thing you need. A JCB would be more use.