What to do with the files in this archive:

Copy: arrow.png to /styles/prosilver/theme/images/
Copy: icon.png to /styles/prosilver/theme/images/
Copy: tip.png to /styles/prosilver/theme/images/
Copy: jquery.cookie.js to /styles/prosilver/template/

tip.psd is a layered photoshop file that can be used if you need to change the colour scheme.