|The imation site doesn't have those downloads anymore. Their ftp site (at least the one they used to have) no longer exists either.|
There are a few downloads for beta win2000 drivers on driverguide. Here's one:
Comments there indicate it may be difficult to install.
(When using driverguide it's usually easiest to download using the 'view a series of ads' option as joining only limits your downloads. When the ad comes up just click the 'no thanks' in the lower right corner. There's only 3 or 4 of them.)
There are some downloads there for win9x but I'm not sure if they're for the external or internal LS-120. I did contact someone who has the original installation disk for dos, win3.1 and win9x. He's going to email me the files.
I didn't find anything for XP but it's possible it will have native support. In that case you just plug the drive in, start up XP and see if it finds it. If not, go through 'add new hardware' and see if you can manually install it.
I haven't checked on the Avanti stuff.