Whenever I run into that (sometimes a test requires the configuration
of 10+ instruments with 10-20 settings to be set each), and that takes
some time, so I just use the "Set Busy" and "Unset Busy" (Application
Control->Cursor), and lock out mouse clicks (so they can't
queue up a bunch of events).
It's not the most ideal solution I'm sure, but the users know that the little hourglass means somethings happening