Bonjour usher99,
I am running Win 7 64 and A650IS (similar to G9) with a 16GB SD card.
Yes, the double partition is a mess under Win but I use VirtualBox and Ubuntu 10.04-i386 installation.
Ubuntu, after little manipulations, recognize and auto mount both SD partitions. After some others manipulations, I am able to transfer SD contents to Win file system, ready to lightrooming.
Just read and learn about VirtualBox and Ubuntu and it's done