I think there is (was?) a DIY on the main page of this forum with an interior trim swap.

http://www.xoutpost.com/articles/x3/...cement-x3.html

I did it a couple years back when I changed out my wood trim for the aluminium. Door pulls are easy. But to change out the centre console around the shifter, you have to pull up on the shifter boot, AND remove the centre stack where the climate control is, which also means removing the centre air vents. Takes patience and care, but I'm not a mechanic and I came out of it alright.