OK, got Aurora working nice on 64-bit Windows 7, all you need to do is install as per usual, and copy a 64-bit version of msstdfmt.dll into the aurora directory, AND run Aurora as administrator, this works on 64-bit Vista as well, I've attached the file that I'm using (hope thats ok)
Oh and if you put the dll in the game directory don't use regsvr32 to register it!