Infinite wireless are a nightmare to install. Is it the Infinite or Prime?
Here is the Infinte Manual
http://ukpanels.com/forum1/showthread.php?tid=2837
http://firealarmengineers.com
I have most manuals and software if you request one.
I have removed them from the site for download as they were ending up on ebay:_|
Dont want to post spam, but have you looked on http://firealarmengineers.com
Part of ukpanels.com, the fire engineers on the site would be to glad to help you.