> are you saying just make sure i dont have the most up to date already or it will corrupt it?

Correct. If the nav is up to date, then don't touch it. Then you won't damage it. There is a chance that a reflash will fail (has happened to some people, see other posts in this forum) therefore only do a reflash if it needs it.

> Does the V32 purely update the Sat Nav or is it the whole interface for the computer/telephone/cds etc?

This is one and the same. The nav provides the interface for the entire system.

> As i have seen some screen shots of the monitor where it shows for example track anmes and artists. Unless thats some sort of ipod accessory I guess?

Yep, ipod accessory.

> if you want to change the splash screen do you do that somewhere in the v32 files?

Correct.