reguarding the immobiliser .u just have to break off the anti tamper seal on the stop switch on the pump,ther should b 2 wires onit just cut them and put a live to one wire and earth to the other wire going to the switch .thatl letb the engine run without the immobiliser ,u cud wire it up to an ignition feed so that when u switch off the van the engine will stop as normal ,hope this helps mate