To use the Remote "Live Preview" feature, you simply need to set up the location details in system preferences:

It should be noted that both types of Live Preview have their place. Local live preview has the advantage that you do not need to be connected to the internet to run it, and it is also quicker, because there is no need to upload files to a remote location.
The 2007 release of Professional Quest features a substantial upgrade to how the Live Preview works. It is now possible to enter Advanced Settings for the preview including:
All changes to the preview are easily transferrable to distributions that are created from a design. This makes it possible to get all the settings right for a particular survey in the designer, then simply accept them as a starting point when building your distributions.