Power lock and alarm options???

[SlantnoseSD]

I went to three different stereo shops yesterday for quotes. Each shop quoted me about $500 or more to install an alram and power locks. I can understand the price of the alarm which is around $300-400 for a Clifford or Viper whihc includes free install. Then they were telling me that the actuators fo rthe power locks are only about $15 each but they install woudl be $100-125 per door.

Is it really that difficult to install power locks and does anyone know a do it yourself kit?

[SlantnoseSD]

These are two different ones I have found. Is anything missing from these kits and can anyone see why I should spend twice as much on the one from Automation?

http://www.autotechs.com/items/item206.htm

http://www.***************/productpage.aspx?pid=100799&name=Automatic+Door+Locking+System&vehicle=17225#anchorLink