The linked page has a download link mark 'Here'- maybe you've already found that? Anyway, download it to the PC, or directly to the Orbit2 (it is about 2.5MB in size). As it is a zip file, you need to extract the tcpmp.cab file from the zip to your PC or to a folder on the Orbit. If you extracted it on the pc, now copy the cab file to the Orbit using ActiveSync. Once on the Orbit, just locate the file with File Explorer, and tap it's name to run the installer.
Do the same with the WMA/WMV files if needed and all should be sweet
