page cache module for CMS

I need someone to put a few lines of cache code to my [login to view URL] must be wordpress super cache module like. The script must show cached version of the page for guest/spiders and non cached version for logged in users (to save php/sql requests). The CMS what I use is called [login to view URL] . Also the script must not damage the core of the script (When I updatethe script to the next version it must require very small changes that I can make (copy/paste) )