What is the proper procedure to install the AJA LHe driver under a Windows 7 64bit system? I was able to get the audio to work in Premiere, but HDLINK doesn't detect the card.

same for me, don't use Machina on the same installation (you need dual boot).
Use Cineforms driver: Cineform Tech Blog Blog Archive AJA OEM-LH/LHe/2K Driver Installation Instructions (http://techblog.cineform.com/?p=2311)

Download this: www.cineform.com/downloads-other/AJACaptureFilter.zip

Then unzip it.

Then double click on it.

If windows asks you how to open it, browse to c:\windows\system32\

and select regsvr32.exe.

You should get a message saying it successfully registered.

Regards
Mikael

That worked.

I am assuming the playback settings under Premiere does not bring up the Cineform dialog box because the RT engine hasn't been released.

True:-), but soon we hope:-)