This is the plist file to run a program in /Library at 12:00pm.
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
Label
ca.ab.cbe.ts.updates
ProgramArguments
/Library/Application Support/Example/.packagerv2
RunAtLoad
<true/>
StartCalendarInterval
Hour
12