Hi all.
I got my canoscan lide30 working on windows7 64 bit by installing the xp mode virtual machine. Then running the xp virtual machine and installing the canoscan drivers into the virtual drive as you normally would with xp. Then when you want to use it, boot into xp, and from the small menu at the top, choose usb, and then attach the canoscan device. Now open up your canon scanning software from within the virtual xp and scan away. Worked for me.