Hi everyone I managed to get my 9630s scanner working under XP Pro sp2 !!
I'm not sure exactly how - but here's all the steps I went through
(there were a LOT more steps and loops to get there...)
1) install DTC436E isa SCSI board driver
system32\Drivers\DTC436E.sys should be installed
you may get
"Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)"
don't worry about this - try rebooting and optionally update driver again.
if this does not work try changing the jumper on the board J1 from PnR "Plug and run" (fixed config ?) to PnP "Plug and Play"
mine ended up at I/O location 02C0