554t install on '99 ram

I just got my hornet 554t, and read through the install manual.  I haven't purchased my 451m yet, and I'm wondering if this can be done just as easily with relays? 

Do I have to bypass the factory keyless entry?

I want a backup battery/siren, as well as a window roll module, and a channel expander for the future.  Can I just add these in whenever I want to?

Where should I use diodes?

Just piggyback the keyless entry wires.

POWER LOCK|ORANGE / purple *1    |5wi|driver door harness        

Use this diagram:  5 Wire Alternating 12 Volts Positive Door Locks and use two relays to accomplish this. You can add all the items you listed at anytime. Just more work for you everytime you ahve to take the dash apart.

do i have to cut the lead from the switch to the motor, and put the relay inline there, or can i just tap in at the harness in the kickpanel.

also, how do i use diodes?

by the way, I ordered my 451m off of ebay already

You can do either. It is easier to grab the wires at the door and run new wires through the boot. I have done both. You have to be carefule if you are going into the driver's kickpanel for the door lock wires when you strip them back. Make sure that you do not accidentally short the wires to ground.

As far as diodes are concerned... is this a general question or are you asking it in regards to the installation of the RS system into the truck ? Here is an over view of the diodes and how they work :

https://www.the12volt.com/diodes/diodes.asp

so do the wires from the switch run through the relay pack to get to the motor, or is the relay pack just tapped into the wires?

where do i use diodes on RS

thanks much

so i don't have to cut the connection between the switch and motor?

sorry if these questions all seem the same, i'm just going for clarity, i don't want to be out of a vehicle.   

thanks, mike

ok thanks, i think i got it now.  because the doorlock circuit runs to every door, the switch wire and the motor wires will all be in the harness in the kickpanel, and i can just tap in there

I think I'll install the alarm/remote start today, and install the door locks when my 451m comes in.  I think in the meantime, i'll still be able to use the factory keyless.