Sharepoint - Search results from only contenttype X
You need to modify the search result web part to only display items of your content type. Just edit the properties of the web part and click "Change Query":
In quick mode, you can do a query for items by content type. Quick mode uses drop downs to create the query, and is rather easy.
In advanced mode, you can use keyword query language. There are some drop downs to help build the queries. The following gets all items that inherit from a content type: ContentTypeId:0x0100EEA1F5E3F2E1CA45983B2EAF52D90F4A*
You could also just use the content type name by using the ContentType: query in the regular search: