I could upload all the files for the bios and the vga bios rom I'm sure it's not impossible to use a hex editor to determine which hex value is for the amount of shared memory. Change value/ save reintegrate flash and done lol
Here's all the stuff anyone would need to find the right hex line where the shared memory value is at and increase it I suppose to 1GB from 128MB. I think there is 2 values in pheonix bios 64MB and 128MB but I would have to look again to be 100% sure.
http://www.mediafire.com/?8t5vmiusop5pfar