If you searched you'd have all the info you need as I covered a lot of this last month...
http://www.mini2.com/forum/interior-...bag-light.html
Although the threads about an airbag light issue I suggest you read the whole thing as theres a lot of people chipping in regarding the chance over and is well worth the read. I think I posted the instructions somewhere in there too.
I did it and it looks soooooooooo much better, however I ran into a few issues. If I was to do it again I'd take the bits to a dealer that would agree to do the job and pay them £120 to fit. Messing with airbags is risky!