Here's the problem... apparently this new Heimdall guy has driver issues that's not supporting a wide variety of Galaxy phones so if you're wanting to make it work by getting the correct drivers for your phone... better post up the driver hardware id here...
[REF] Heimdall - Hardware IDs & Supported Devices - xda-developers
What a shame.
EDIT: WTF... Can you believe this....
http://forum.xda-developers.com/show...3&postcount=43
If we're in download mode why didn't windows detect new drivers for Heimdall?