After much researching I finally took the plunge and upgraded my
G1Sn-x1 to 8 GB of RAM and am happy to report it booted without a
hitch! Windows 7 64bit sees the entire 8GB ! It looks like my concerns
about the chipset limitations have been proven otherwise.
I used Corsair ValueSelect DDR2 8 GB set of 2 4x2 modules.