Model: Acerscan 620U
Operating System: Windows 95 & Windows 98 (Note: might work with other versions of this os.)
How it works
This will give you disk1.zip and disk2.zip
Unzip disk1.zip to a folder called disk1.
Unzip disk2.zip to a folder called disk2.
Run the 'Setup.exe' file in the 'disk1' folder - halfway through it'll ask you where 'disk2' is. browse to wherever you've unzipped disk2 and that's it!