I have the same problem, that is I downloaded the driver
for XP and tried to install it on an old but functional XP machine and it needed a disk. No combinations of settings allowed me to do that.
My end objective is to find out whether I can install it on a true XP, and if that works, try upgrading the Windows 7 I have to the next level and then installng the down-loadable XP and the driver.
Any suggestions would be appreciated, I really like that scanner because I use two sizes of film/slides and also like to do flat bed scanning. What a wast for this scanner to be scrapped because there not that I can find that have the features the 1230U has.