FYI - it looks like both 32 and 64 bit drivers come in the standard package:
http://support.spectrumdigital.com/guides/JTAG_Emulator_guide/#1.2
If you don't see it in CCS setup after you run it, I'm not sure what the issue is.
Really, CCSv3.3 support on Windows 7 is hit or miss (as you are experiencing right now). I would actually recommend running inside a Windows XP VM. That is the most common workaround for users who have issues with CCSv3.3 on Windows 7.