2002 vw jetta r/s advice wanted

I'm looking into buying a car on wed (should be pretty easy to guess what make make/model/year if you read the title). 

Im newer to the install game, I've watched a couple and I'm working on finishing the MECP.

From the information I have available to me, I will need to leave a key in the car as there are no bypasses for this. I read off the 2002 VW golf, to diode isolate the parking lights from the starter, any more info on this would be useful to me, as well as any info on other triggers to diode isolate (door triggers? or lock/unlock?) I've read the unlock pulse will disarm the factory alarm.  Just for added info the car is a manual, with power windows. I've read this means I need to get the door pins off each door individually and I'm hoping someone has better info on this. 

I've recently been employed at a local install bay and would be the only one here willing to tackel the VW. My hope is after doing it on my own car I will be able to succesfully and efficiently replicate the process for customers.

Any and all advise is welcome, let me know what you think. I'm also planning to use a compustar model with a blade bypass module, as they are readily available to me.

Thanks in advance. And Hello to the forum! (I'm new to the group)

I've done my homework and read a ton of Howie's posts, seems like the master haha. I have access to wire locations and colors, and I know what I'm looking for. I'm just hoping for any extra info specific to this car make/model/year and specs (manual/power windows). Basically just experiences from the guys that have done it would be great, like the things that aren't/weren't where they were supposed to be if that came up at all. It doesn't sound like an overly complicated install, I am still getting my head around diode isolation with car starters (blocking false alarms and retaining factory behaviors). More shall be read on this subject.

I always research my projects and I thought it might be worth asking for anything above and beyond what I've read so far, as I'd like this to go smoothly and not take 10hours, which is what the shop apparently quotes currently on any VW project. If I can get my car done well then we might be able to provide the service to customers for a reasonable price, instead of a rridiculous price.

I've also just learned the car comes with a valet key (something about previous owners using it for a security system? sounds like they must've had a car starter that has been removed and left the key??) I can't think of any other reason for a valet key for just an aftermarket alarm.

Thanks for the "step by step" :D much appreciated.  I've read even on factory power windows that I have to grab door triggers from each door? That true? And thanks for the clarification on inputs to the BCM on the hoodpin/trunk pin.

I'll look up those DEI's that you've mentioned and luckily for me I bought the car with 2 keys + a valet key.  I'll try to locate the 556U.

Funny side story: the guy selling the car tried telling me that it was imported from Germany to Alberta (Canada) by the last owner.  I looked at him and told him that wasn't likely as my carfax tells me it was manufactured in Mexico. He looked a little bit broken inside and I felt bad, but it was likely a Canadian car since day 1...

well this is funny I just checked our bypass stock, and I found a 556uw, looks like it can handle everything I need it to, anyone know if it might not?