I use Custom Post types on an Xtreme site as well as Custom filed for them.
I use the Free Plugin Toolset Types below to do that
https://wordpress.org/plugins/types/
The plugin lets you create Custom Post types and Custom Fileds, and adds the custom fields User Interface in the Post editing page. It also gives you Shortcodes to insert the custom fields in your content where you need them.
Then I simply use the Xtreme Theme “Page with posts template” to display them like I would any other posts.
Just create a standard page, select the “Page with posts template” in the page attribute box and publish. You then have all the Xtreme theme option fro this page available, including a filter box for custom post types.
Do make sure you have installed the Xtreme Theme Support Plugin.