I was able to download it and get it working this morning, so maybe I can help.
Lordblacknail, you will actually be importing data from the petsearch excel sheet to Ryazan's workbook, rather than the other way around.
Talaan, when you open Ryazan's workbook, you need to enable macros to get it to work. They were disabled by default, but there was a bar at the top of the sheet with "Options" that allowed me to enable them. After that, click on the "Import Pets" button to get started. You need to have Office 2007 or newer for the workbook to work.