First off, I've only had a look at this in the dark, so if it's glaringly obvious how to do it come daylight, I'll have made an arse of myself, but here goes:

Anyone have any idea how to run the wiring for an aftermarket CD changer past the passenger side airbag? I've dropped the cable down the same side as the aerial wire, but I can't seem to find any easy path for it across to the passenger side door (I'm fine once I get it to there!). Does it just drop down somewhere beneath the carpet, or am I going to have to take the glovebox/dashboard/something out to run the cable?

Also, is there any way of telling where it's OK to drill the holes in the wheel arch to attach the changer? Don't want to go breaking any important brake lines or anything...