easiest way is to disconnect everything in the engine bay (wiring, fuel lines, water hoses ,vac hoses etc) remove ancillaries (rad, airbox, tanks etc) jack up the car and unbolt the strut tops and rad carrier. support the engine by crane and unbolt the top drivers side engine mount and front passenger gearbox mount. then unbolt the 4 17mm iirc bolts from the subframe and then it should lower down. do the reversal to put in the van.
just remember to label all the connections so you know where they go and take as many pics as possibly as the will help.
remember he'll need the tank and the whole loom so i'd start here first.
if he's familiar with the rs2000, which i doubt he is with this thread being posted you could do in a weekend but i'd say at least 2 weekends if not more