Vampire Resources

https://apollo-accelerators.com/
https://wiki.apollo-accelerators.com/doku.php
Apollo Vampire System Tools

1) copy all your files somewhere else
2) install pfs3aio to the RDB with the Add/Update button on the partitioning screen in hdtoolbox (this is done once per hard disk)
4) use the dostype 0x50465303 when it asks since you're using pfs3
5) use the Change...-button on the partitioning screen to set pfs3 as the filesystem in the partition(s) you want (File system custom and dostype PFS\3, you should have typed the hex in correctly in step 4)
6) save the changes to your disk in the main window of hdtoolbox
7) reboot and reformat these partitions
8) copy files back