Electronic Alarms and Home Security Devices - Adding keypads and components to a Safewatch 3000EN / Vista-20P System

So I went with ADT several years ago, primarily because of a deal they have with my insurance company whereby my install and monitoring were heavily discounted and the monthly cost is nearly entirely deducted from my homeowner's insurance. Of course, if I want to add features, I still have to pay the ADT ripoff prices.

This leaves me with a Safewatch 3000EN system w/ 5882 (according to the board, or 5881ENH, according to the sticker inside the box door) wireless board coupled to a 6150 keypad. I understand from reading posts here that programming the system with a 6150 is extremely difficult. My best bet - I think - is to hardwire in a 6160 keypad in the master bedroom, which will require some interesting cable pulls but it's fairly doable.

What is involved in installing a second keypad, in terms of wiring to the main box? I read something about simply wiring it to the same 4 terminals as the 6150 and then setting the 6160's panel's address to "17", is this about it? Is there any programming involved after the panel is installed or is it just a matter of wiring it in? Dumb question... but should this be done with the system powered down?

Once installed I assume that this panel will allow me to add wireless zones on an easier basis.

Bonus question: the installer gave me an X10 lamp module that he said works with this system but I can't figure out how, exactly... help?

Dumb question... but should this be done with the system powered down? yes

I read something about simply wiring it to the same 4 terminals as the 6150 and then setting the 6160's panel's address to "17", is this about it? yes but you want to look at the address of the old keypad first it may be 17 all reedy so the new unit will need to bee 18

the installer gave me an X10 lamp module that he said works with this system but I can't figure out how, exactly... help?

Wiring the AC Transformer
1321 Transformer:
Connect the 1321 Transformer to terminals 1 and 2 on
the control board. See wiring table at right for wire gauge
to use.
4300/1321X10 Transformer
(required if using Powerline Carrier devices)
1. Splice one end of a 3-conductor cable to the wire ends
of the SA4120XM-1 Cable.
2. Connect the SA4120XM-1 cable plug to the 8-pin
connector on the control (see the Summary of
Connections diagram for location of the 8-pin
connector).
3. Connect the other end of the 3-conductor cable to the
4300/1321X10 Transformer, as shown.
Notes
• Use caution when wiring the transformer to the
control to guard against blowing the transformer
fuse (the fuse is non-replaceable).
• Wiring to the AC transformer must not exceed
250 feet using 16 gauge wire. The voltage
reading between terminals 1 and 2 of the
control must not fall below 16.5VAC or an “AC
LOSS” message will be displayed.
• Do not plug the transformer into the AC outlet
while making any wiring connections to the
control. As a safety precaution, always power
down the control when making such connections.

You will need to enable address 17 in programming...

From the 6150, enter 6321+800 (you will be in programming)
Enter *190 1 0 (enables address 17 with no supressed sounds)
Enter *99 Exits programming.

Place system on test with ADT
Power down the alarm (disconnect transformer and battery)
Wire in 6160 Keypad
Power up panel and hold * and # together on new keypad
Enter address of 17

Keypad should be up in running.

As far as the X10 lamp module, I am not sure if you have the X10 Transformer...post back with how many wires go to your transformer and the model #.