Help! Need A Scanner/scanning Software/tools.

[bopian]

I have Canon D646U Ex. It give me the software for scanning. The problem is, that when i click "custom1" on the toolbar, the scan menu appear. But after scanning the menu disapear and i need to repush the "custom1" button again! and this keeps going on and on, its hard for me to scan a book, because with this problem, i cant get the scan to be exact ?x? pixels width and height. So is there any other scanning software or tools? or is there a way to keep that scanning menu on forever, without it auto closing and i need to push the "custom1" button many times?