how to install my mdt avanti alarm?

Hi, I have rightly or wrongly just got an alarm from Ebay and it as turned up with no wiring diagram or installtion instructions at all, it seems to be an avanti (intellisense) alarm, i have sorted the bulk off it out but the anti tamper side of it is causing me grief! also I would like to know if it is possible to reset the unit to its factory settings, ie codes,Many thx in advance Gary Porter