You could try Vuescan from Hamrick if you don't find a suitable solution. The software allows you to use your scanner on a 64-bit OS through its program by providing its own 64-bit driver. It usually offers more options and tweaks over the standard software issued with the scanner. The downfall (if you want to call it that) is it will set you back $40.00 for the Standard edition or $80.00 for the Pro edition. There is a 30-day trial version as well.