You dont need drivers really, they are just cd-roms.
Anyway, Kenwood was the only company to use the zen technology to increase read speeds. However, they had a VERY HIGH failure rate. And this implementation never really caught on. And these drives are HOT!!!! I mean, at idle these drives are very very warm. Even more so than my burner.
I was one of the lucky ones with my 52x version. Mine actually worked, well, its out to pasture now... but the read speeds are real. Truly the fastest CD-ROMs ever.