Rio500 drivers for W98 and W2K under VMware

VMware W2K and W98 do not recognize my Rio500. As I run not from a physical disk, I cannot reboot into W2K or W98 and install the driver from there. I checked, however where the drivers go during the install under W98: the driver consists of two files: riousb.inf and RioUSB.sys. The riousb.inf goes to two places: to C:\windows\INF and (under the new name of RioPort.Comriousb.inf) to C:\windows\INF\OTHER. The RioUSB.sys goes to C:\windows\system32\drivers. I couldn't check where W2K puts the drivers, becasue when I tried to start up W2K I got the following error: Cannot find file system32\ntoskrnl.exe. Please reinstall.