You can try this one http://www.megaupload.com/?d=TNC9LTY2 it is v29, but no changes have been made to MK IV in v30 so no difference, If you have torrent sofware try this http://www.isohunt.com/download/18112640/bmw+v29

When downloaded, unpack with winrar or similar soft, use img burn, alcohol 120% or other image writing software to burn the soft on to a cd, dont burn att max speed 4x is good, do not use cheap media it wont work.
If you want a custom splash or something else use navtweak (read the thread)

Good Luck