For some unknown reason, 3Com will not provide this driver on their site because of some bundle with Microsoft's HomeClick network setup wizard (which is just a friendly front end that manipulates your network settings).
The drivers were just sitting in a folder named \drivers on that CD.
I happened to install this adapter on a legacy free system (no CD, no floppy) and I figured I could download the driver from the 3Com website.
Shame on you 3Com! I though I could count on your products over the lesser brand names.
The following files are found inside the driver download file.
|3C460R.DLL||48.9 KB||26 Aug 1999|
|3C460.inf||7.9 KB||26 Aug 1999|
|3C460.sys||51.0 KB||26 Aug 1999|
|3C460R.EXE||63.8 KB||26 Aug 1999|