I did a search first but couldn't find what I was looking for.

I have an '03 540 that has a cracked cylinder head. Rather than drop $3500 to fix it, I am starting to think about an engine swap. A couple of my friends are telling me to swap my 4.4 with a 4.6 or 4.8 out of an X5.

They are thinking it's plug & play, that all of the electronics and plumbing are the same. My car has the Dinan S3 package, though, so I'm assuming I'll need new software.

Anyone know of someone that's done this? Any advice, suggestions, etc?