[Laplacian]

I'm looking to install the alarm myself in my E90 (Jan 2006 build) which should be here in about a month or so (now "awaiting transport"). I plan on following the DIY instructions posted here. Would I need any software updates, or will my Jan 2006 build E90 already come with all of the software updates? I've heard of some people needing to go to the dealer to "activate" the alarm after they install it themselves. But it looks like post-Sept. build cars don't need this, they are all set. Can anyone else confirm this?

Also, would a pre-Sept. build car need a software update or dealer activation to activate the alarm? If so, what is it? CIP20? (My sister has a May build E90 and would probably want me to install it on hers too.)

Thanks! This forum has been very informative and helpful so far, especially this DIY section!