..you just have to pause during installation when the "language choose menu" appear. Connect your scanner and the windows would do the rest
Note: if you've attempt to install it before. Go to "Device Manager" and uninstall troubleshooted hardware..which is your scanner then disconnect it and then reconnect it again
ftp://ftp.mustek.com.tw/pub/driver/1200UBPlus/98-XP/12LV20/