If you goto hardware setup and when it asks for a disk when looking for a scanner you go to the necessary folder where you unzipped the drivers, then it shall install.
P.S. Hens tooth style driver to find, enjoy.
The following files are found inside the driver download file.
|uploads/ENGLISH/DRIVERS/HPUDRV.INI||38 bytes||8 Sep 1998|
|uploads/ENGLISH/DRIVERS/REG32.DLL||17.4 KB||11 Dec 1998|
|uploads/ENGLISH/DRIVERS/HPUD32.DLL||148.5 KB||9 Dec 1998|
|uploads/ENGLISH/DRIVERS/PPSCAN.VXD||96.4 KB||15 Sep 1998|
|uploads/ENGLISH/DRIVERS/P1220_32.DLL||110.6 KB||13 Oct 1998|