There are 8 slots. You can make more by overwriting them.
If you want to save them - make a new folder, label it with descriptions or #1, 2... or both (which is what I did.)
The copy the 8 files and place it in that folder.
Then overwrite the 8 old ones.
When you finish these 8, copy to a new folder and so on...
as for Vista - I am not familiar with Vista - ask at Glicthes forum where they are.