My cheapo epson all in one does this directly through the Mac OS scan function. I never installed any software so I assume it's native to Mac OS or it's somehow installed as a driver when I plugged in the Epson. I just go to the printer setting and hit the scan button. It seperates the images but not always accurately so I have to adjust it. When you hit scan it scans them as seperate files with names growing in number 1,2,3....
If you are using a Mac perhaps you can already do this?