Hi,

I want to upgrade my nav software for X5(2006) and have found the following items on the net:

V28 software update (this seems to be a .mdf file) (300MB)
the DVD-high software (from a french poster)

Question:
What do I need to do without running risk to crash the nav-system?
I suppose I need to burn the .mdf file to CD and insert it into the MKIV system?
Next, I burn the high version on a DVD and insert that one in the MKIV?
Which formats are supported by the MKIV (CD-R, R/W, DVD R, R/W,...) ????

Many thanks in advance,
Steven