2006 gmc 2500 hd diesel and scytek

Let me start by saying this is a great forum with lot's of great info. I have searched this board and others so here goes. I was given a galaxy 5000 rs 2w-1 alarm/RS system and need a little guidance installing it. I was going to bring it to the local install shop but after they drilled 2 holes through the hull of my friends 60K malibu ski boat installing an amp I would rather try  to do this myself. If I screw up my $45k truck then so be it. I have a degree in electronics and am very mechanically inclined but I have not installed an alarm in 10 years. From what I have read so far this truck is fairly simple. It is a 2006 gmc 2500 hd diesel crew cab 4WD. I ordered a gmdl-bp interface/bypass module and understand this and two relays are all I need to complete the job.

The questions I have are:

Do I still need to go inside the driver/passenger door and the bcu for the door latch inputs with diodes or will this unit take care of that also?

Are any other isolation diodes needed for this setup?

I know I will need two relays, one to invert the glow plug input polarity and one for the starter disable.

I will be attempting this saturday morning and would like any tips on extra parts (the nearest electronic supply store is 20 miles away) or things to watch out for so I can have this done before noon. Thanks in advance for any helpful information.

Thanks for the reply. I read alot before deciding to do this myself as it looks pretty straight foreward. I just need to make sure I have everything I need before dismantling the truck and having to stop halfway to go pick up another part.

Is this a good product? It was given to me by a friend who purchased it earlier in the year and ended up trading in his truck before installing it and had the dealer install one in the new one.

Thanks.