Right, I've found the Iomega Driver 4.2, which will work with 7.6.1. The other classic Mac OSes that I have around are 9.1 and 9.2.2 - what driver should I install on there? You say "it comes with" a driver - do you mean the OS does, and presumably you have to install it as an extension, as I don't currently have any Iomega extensions around? Iomega recommend "IomegaWare 4.0.2" for OS9, but that looks quite bloated and so best avoided as my Macs are mostly slow models anyway! Presumably it's better to use an older driver that is standalone - is this 6.0.8 one good, should that be on the OS9 CD or something? Or can I get the newest driver but just extract one extension or something from it so that I get the most up to date driver but without all the extra bloat?

As for the keylogger, presumably you got that driver from a site other than Iomega itself? I have found that the parallel drive is plug and play anyway on Windows, at least on XP+, as I've never installed any driver for it.