My wife and I just bought a 2010 Civic DX recently. The only downside to the car is that it does not have keyless entry.

Currently, the car does have power windows, but does not have (and has never had) power locks in the doors. In this case, I know that I will have to install the actuators and maybe some kind of brackets for them into each of the car's four doors. The good thing though (from calling around to car audio installers) is that it sounds like all of the electric wiring should already be present in the doors.

Here is the catch, I want to do this myself and as inexpensively as possible.
I was quoted anywhere from $550 - $650 installed and that is about DOUBLE what I would like to spend. An alarm to go with this would be nice but it is definitely not necessary... I am mainly just going after the keyless entry.

If possible, I would GREATLY appreciate if someone could please provide detailed instructions on parts and prices, with installation diagrams, web links, etc.

Thanks so much!