Try using a different name than Z:
By default, when a 95/98 machine authenticates, it maps z: (or the last available drive letter) to \\DomainController\netlogon for the duration of the login process.

Try using X: or Y:

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Paul Moxey
POS & Senior Network Administrator
Taubmans Pty Ltd
Paul_Moxey@taubmans.com.au

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Paul Moxey POS & Senior Network Administrator BarloworldCoatings (AUST) Pty Ltd