central locking isn't that expensive, i got a generic kit for my friends toyota starlet from maplins £28 (inc. my student discount!

) for 4 motors, the control module and the wiring loom. Its not that hard to fit, but basic knowledge of electronics is useful!
i think the windows would be harder to do as you'd have to take the winders off and it wouldn't look all that pretty.
I don't think any clifford alarms come with lock motors, they do come with the relay to control them though, but i don't install alarms for a living so bullitt may be right

. the maplin kit i bought has a earth lock/unlock and interfaces nicely with a scorpion alarm i got off ebay.
now when you press the disarm button the doors open.
