Changing from single-user to multi-user

I have a user with the R5 Notes client installed on a Win98 PC. There is a new user who needs to be able to acces Notes from the same computer. Can I upgrade the client to R6 and select multi-user? What will this do with the original user’s files/settings? Does the multi-user feature run on any Win9x and above O/S?

Subject: Changing from single-user to multi-user

Win9x really doesnt provide mutiuser functionality. What you can do is set up Location documents with the switch ID setting pointed to thier IDs and mailboxes. It sucks but to really get multiuser functionality you need to be at windows2000 or above (not sure about nt4).