Any remote starter you will buy, and i mean any brand, will need a bypass module in order to bypass the transponder that's in your key. Some modules will do only the bypass and others will do the bypass and control the door locks, trunk, and a lot more stuff.
What you need is only the bypass module 'cause you have no power package in your car.
So any remote starter AND a bypass module.
Autostart remote starters are a bit easier to install than the Viper (I do have a Viper in my car).
THe XK07 has been discontinued for a while. Best bet would be to look at these website for the Bypass modules and remote starters.
Just have to enter make/model and year to find the right module.
Idatalink:
iDatalink - Front Page
Xpresskit:
XpressKit.com - Interfacing the Past, Present and Future.
Viper:
Viper - Car Alarms | Remote Starters | SmartStart | Window Tint | Window Film | Vehicle Security | Keyless Entry | Interface Modules | Accessories | Transmitters | Remote Start | Find Your Next Car Alarm or Remote Starter
Autostart:
Autostart
If you've never done installations in car, i would suggest that you have the job done by a professionnal installer, not that it can't be done if you really take your time, but it has to be done the right way.