does it matter if mine is service pack 2 or will any Vista Home Premium version work?
It won’t matter.
https://support.toshiba.com/support/viewContentDetail?contentId=2737864
Many Toshiba laptops come with the factory software recovery image stored in a special (hidden) area on the hard disk. From this special hidden system recovery image, you can restore your computer to its factory-fresh software condition by following these steps: (see linky above)