Yeah you're probably right - thing is that will cost me into the hundreds, for a system that is probably not as good as a brand new TomTom would be out of the box for £100. If it's just a matter of £15 for a CD (which I've now shelled out for!), then it's worth it, but otherwise I don't really need satnav that much.

Is the MK4 a good sytem? Would it still communicate with my OBC to give me arrival times on the MID etc?

EDIT: My current software is SW 2-1/25 - probably the one it shipped with. Will that HAVE to be updated as well?