The two options are
1- Use a 3rd party application which will let a windows xp system read a apple formatted drive.
Such as Mac Drive. http://www.mediafour.com/products/macdrive/. This will give you the ability to see a Mac formatted hard drive in Windows.
2- If you have an apple computer, Network the two machines together, share a folder on one of the machines. Copy the data on to the Hippotizer system then upload the media.