Yes instructions should be in your owner's manual. Check here http://repairpal.com/automobile-owners-manuals-online or try this link you may be able to down load a free copy of the owner's manual for your vehicle http://www.autousermanual.com/
RepairPal Certified shops can diagnose and repair your 2004 Chrysler 300M. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Tried that....It do not stay programmed....What could be the problem...