got it done with win7 x64
now to install flac.
installed these drivers from usbdrivers
(these were provided by cheesemoo over at the tether thread. followed the instructions , debug mode and the whole nine. rebooted my phone into dl mode and plugged it in. i saw the G device and while the phone was connected on dl mode installed Samsung_PC_Studio_321_GL6 after setup was complete i ran odin but it just hung there for a while. so i restarted the dl mode on the phone 4 times until it finally found it. it seems you gotta plug in the usb as fast as possible. im not sure if the other drivers were necessary but just wanted to let you guys know its possible on x64 win7. GL