So I think I have nailed down how to attack these legacy files in an unmanaged environment. Please feel free to chime in if you know of a more efficient way.
1. Separate the RELEASED files from the AVAILABLE files. I have not found a good way to do this. The way I currently accomplish this is go to the Property Manager, expand all, use the "SE Status" and "Folder" properties and sort by SE Status. This allows me to have all the released files and their relative locations at the top.
2. I then use the data management tool to do an "Analyze" on the top level CAD folder. I copy the file names and folder locations of all the RELEASED files to the resulting excel analysis after deleting all others. I then sort in ascending order.
3. I create a Released folder and dump all of the files in there using the management tool "Modify" on the excel generated from the initial "Analyze" process.
4. I then batch convert these files from RELEASED to AVAILABLE.
5. I then add the NEW properties using Property Manager to both the Released folder and the files in the top level CAD folder. The RELEASED files in the top level will not populate because they are read only, but all the AVAILABLE files will. I use the Properties Manager because I have not found any other method that keeps the string type (ex: text, date, number) intact.
6. I now have the NEW properties in the original RELEASED and AVAILABLE files.
7. I now use Property Remapper to make the legacy properties equal to the NEW properties, and delete the legacy properties in both the Released and top level CAD folder. If there were no properties to begin with, the NEW properties are inserted with default values.
8. I then batch convert the files in the Released Folder back to RELEASED. I now have all originally released files with NEW properties and all legacy properties deleted.
9. I now use the original excel file and use "Modify" once more to transfer the files from the Released folder, back to their original locations. This should be as simple as copying and pasting the file path columns, especially since they are in ascending order already.
10. I am not worried about the RELEASED drawing borders because they can just be opened in a viewer program and printed. If a RELEASED file absolutely has to be rolled back, a quick change of the drawing border is all that is need to get rid of the ERROR: NO REFERENCES text.
Feel free to let me know if I am missing something or you have a more efficient way to do this. I realize how dangerous this process is, however, I believe all that would be necessary is to make a backup copy of the top level CAD folder in case anything goes wrong. The logic behind this method is that we often don't use new part/drawing/assembly templates. Our file creation method involves a lot of "Save As" using existing released assemblies. With this method, the new properties and borders can get easily perpetuated. There will be the initial tedious task of changing the borders, but once it is in most of the drawings, we should be good to go. I am afraid to use batch conversion borders (if this is even available?) for fear of not being able to print older drawings in viewer programs because of jumbled text associated with manual text boxes in older drawings overlapping the NEW properties.