Mustek 800SP Free Driver Download
600IISP, 800IISP, 1200SP, 600IICD
Video Tutorial: How to Download & Install a Driver
Supported Operating Systems
Windows 98, Windows 95
Link to Page
You may try this one, it may work.
LC (DG Member) on 7/21/1999
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The installer setup file has been certified safe by leading-class virus and malware scanners.