Now we have to make a TSSOP package for it. Again, I'm lazy, so lets do what we can to 'reuse' an existing package. This will save us a bunch of time!

Go to your board editor (create the board layout if you haven't yet) and click on the ADD button. This is a bit of a hack, the easiest way I've found to browse packages.

Search for *TSSOP14* - this will pull up all matching packages

The first package looks pretty good, its from the 74xx-eu library...Now go back to the main Eagle window and find that package by browsing to the 74xx-eu library and right-click Copy to Library