David,
If you have installed the NI-DAQ software you should be able to find Measurement & Automation Explorer (MAX) by following Start->Programs->National Instruments->Measurement & Automation. If you do not have NI-DAQ software you can download the latest version at
this link.
With regards to your second question you should already have the NI-488.2 software that came with your GPIB hardware. If it is installed on your machine then you should be able to follow Start->Programs->National Instruments->NI-488.2. If you do not have this software you may want to contact National Instruments to obtain it. Good luck!
Craig H.
National Instruments