Adjusting plugins to apply to custom post types

After Custom Post Types are created, (or if you are using a theme centered around CPTs), how does one navigate installing plug-ins that apply to regular posts? For example, I have a plug-in that converts regular posts to Eventbrite compatible events, how do I get the plug in to apply to the special ‘Event’ type post instead of regular ones?

An answer to this problem would save my life!