Hello,
I have been reading this thread with great interest.
I recently bought a Rover75 (from when BMW were making them) with the Hi-Line 4:3 Sat nav in but my splash screen shows BMW on booting up, I would very much like to change this to a nice Rover Logo.
My Drive is a Mk3 with BMW firmware 3-1/63 with the splitscreen option (which i would like to keep as the Rover firmware is naff)

I really havent got a clue where to start on modifying a disk etc. and I understand i would need to install an earlier firmware to enable me update again to the latest version.

Would anyone please be able to help me make the disk images i would need to do this.
I have tried the rover forums but they all point me over here to you nice chaps..

many thanks...Dean

PS - I am after something like this (don't know if this would have to be cropped or changed to fit my 4:3 screen ???)