Once installed, you simply choose an area on a page where you want to display your feed, choose to add a block of the type Tumblr Feed.  Enter the Tumblr username you wish to provide a feed for and click Add.

It is also possible to set the width of images in photo posts and to select both the number of posts per page and whether to display page links to the other pages.

A new feature in 1.1.4 allows you to show your feed on a page somewhere and enter a single entry URL to another page on your site (e.g. www.mysite.com/singleentry/)  On that other page you put a Tumblr Entry block included in this package and links from the main feed will link to individual entries on the other page.