Hi Adam and Jon. Thanks for the responses. I found a work-around to add the PST file as a new source... I just needed to create a fake source directory and point the un-indexed source to the blank directory (walking away for the night must've cleared my brain ). Also, I didn't want to re-index because we are using Intella Connect to share this case with other groups involved in the case. There are tags from multiple individuals along with notes/references that others have made to the item ID's from the original index. (Like the 3rd party you mentioned, Adam). The empty source doesn't even show up in Intella Connect (except in the activity stream).
Lastly, there are a lot of different sources for this case. Since I am working with multiple individuals, I am trying to organize the sources as clean as possible to prevent confusion.
Thanks again!
Ed