In the NI resource library there are drivers for the LakeShore 330. However, there are only drivers for LabVIEW versions 4 and 5, not 6i as you might have noticed. But I would assume that you can use the 5.0 driver for LabVIEW version 6i since the new LabVIEW update was very smooth and easy.
Below is the link to the LabVIEW 5 driver. Hope this helps. /Mikael
http://zone.ni.com/idnet97.nsf/9b2b33e1993d877786256436006ec498/dc5abd9629695df2862568ab005fbaf3?OpenDocument