106/saxo EPAS Pump and vaxhall 4x4?

Right without going into mega details ect which will take ages exsplaining im after personal exsperiances and knowledgable opinions on electronic power asisted steering pumps and more specificly there ability with vax 4x4 setup?
basicly after a recent re think i have decided that i would like to keep the 4x4 in the nova switchable and hence the need to run the acumulator and pas (reason beeing im planning on using a qrew qw300 race box which is welded shut and needs the hydraulics)

so my question is would a 106 saxo epas pump run the 4x4?

also without all the its not safe coments as im well aware of the risks involved am i correct in thinking that if the 4x4 ecu was binned the acumulator could be activated via sending switched power to the solinoid on the side of it to engage disengage the 4x4? or is there more to it?

any help info apreciated