Brittany, are you using SuperLab version 2 or 4? From your description, it sounds like it’s version 1.7x for Mac or 2.x for Windows because version 4 does not ask you for each file one by one. Instead, when it cannot find the stimuli files, it lists them all at the same time and even lets you proceed to edit the experiment without locating them. The files are required only if you run the experiment.
Steve, just to clarify: version 2 did not require that all the stimuli files be in the same folder as the experiment file. But that’s where it looked if all else failed. Generally, we recommended that stimuli files be placed in the same folder if one was planning on moving or copying the experiment to other computers. It was simply the path (no pun intended!) of least resistance. Version 4 includes a “Create a Package” feature that stores everything and restores the paths when you decompress the file later on.