if you want it to autoload when you install a cab consider appstars titanium installer here,
http://forum.xda-developers.com/showthread.php?t=509492
if not, you will need to edit your HKLM\Software\Microsoft\CHome:ExtensibilityXML to insert it and insert the code into the .cpr's manually. so appstars program is highly recommended. btw if you do not insert you code into the .cpr's or put the plugin in the list at the ExtensibilityXML it will not work.