Well, my initial impression is that the Billionton BT drivers work in Windows Server 2003.
I downloaded from http://61.71.104.13/drivers/1.4.2.11-N/1.4.2.11-N.zip
Unfortunately, I don't have my BT dongle handy so I can't test it. However, the drivers installed without any problems and didn't complain about having an incorrect licence.
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