No problem mate, First, you need to download a couple of applications first. (these are not the only ones you can use, its the ones I use, that’s all).
imgburn:
http://www.imgburn.com/
UltraIso:
http://www.ezbsystems.com/ultraiso/
To mod the splash screen you need this app.
Navtweak:
http://rapidshare.com/files/8925524/navtweak.zip.html
Then the latest version on the firmware.
v29.1:
http://www.megaupload.com/?d=TNC9LTY2
This next bit sounds complicated, but is straight forward.
1: unzip the v29.1 image to a sub dir on your PC
2: install and open UltraIso, open UltraIso and navigate to /V_2/RR/0101/BMWC01S/app_sw then drag and drop the navboot file onto the desktop.
3: install and open navtweak, then open the navboot file into navtweak.
4: select the images tab, then the rombitmaps tab, and then scroll down to #14 and the right click and replace the image (with a one you downloaded and kept on you desktop).
5: save the navboot file (after making a copy of the original, just in case)
6: drag and drop the modded navboot file back into the open UltraIso image and overwrite the old navboot file with the modded one.
7: save the UltraIso (file, save as) and call it v29-modded.iso
8: install and open imgburn, open the v29-modded.iso file and place a blank CD in your DVD writer, then write at x1 speed only
9: follow the update procedure for upgrading the Nav computer.
Job done.
The nav unit doesn't allow it to "update" with the same software as already installed.
So you already have v29 installed then you can downgrade to v28 the back up again.
Thats it.
This is what i have
http://www.xoutpost.com/305946-post155.html
HTH