The firmware is located on this page:
http://www.r4i-sdhc.com/SaveDongle.asp
I don't remember needing a driver... then again, I haven't used my free one is quite some time.
EDIT: Ignore. Just read your link.
I really need to learn to read the whole post and links.
EDIT2: The file you're looking for is PS3break V1.2 Burner tool. It's a rar that includes all the drivers you need.