Hello, and good luck with the upgrade.
Are you fitting one of those low cost eBay/Amazon kits? or using parts from a higher specification model?.
If using a kit it would be interesting to know if you can tap into the (un)lock-all switch on the drivers arm rest from a reasonably accessible location. The looms are mostly covered in conduit, quite short, and well clipped to the body.
I'm picking up a Honda receiver for another member from a 2007 car, at a breakers in about 10 days time in order to help a similar project. It's possible there will be a couple of these available.
Wiring diagrams & more at
http://www.hondafitjazz.com/manual.html specifically
Power door lock control circuit to help with finding the right colour wires.
UK & Eire models are designated KE and are fitted with 'Super Locking' i.e. dead-locking with two presses of the remote.
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TG