Hey guys, a few newbie questions on this nav stuff...

1) I have a US 2005 M3, it has the DVD drive in the trunk and the 16x9 monitor, that automatically makes it an MKIV right?
2) The latest OS as of 1/10/07 is v28 right? and the latest maps DVD is 2007-1?
3) I saw the link to download the OS, but I am reading that by installing it, I run the risk of kicking my nav into "euro mode". What causes the nav to go into euro mode? is there any way to get back to US mode without going to the dealer or buying expensive programmers? Don't really want to have to go to the dealer everytime I "experiment" with the nav. And certainly don't want to "openly" void my warranty.
4) Whats the latest/greatest/easiest way to change the splash screen? I've seen a few different guides, but not sure which is the current method
5) Any known way to automatically skip the ACCEPT disclaimer? Seems like it should be pretty easy to patch one of the files to skip this step, but again, I'm concerned about kicking the nav into euro mode.

If I ended up having to go to the dealer to get recoded, wouldn't they just wipe the software in the process?

Any help for a newbie would be appreciated!