Right guys from doing some searching on here, it is possible to change the system for an after market one.
Correct me if I'm wrong the iso leads are behind the dash which you unplug from the extension leads which run down to under the seat. You then have to extended the ariel wire from under the seat up behind the dash.
What i cant find out is about the steering wheel controls do you have to extend them up from under the seat?
What systems have you guys put in?, I'm not to bothered about the display working