@David Durst If your use case is to extract data from 4000 cases, you can write a UserEvent script that will do what you need, you write a simple Mass Update or Map Reduce and just load and save the Case Records one by one... you are done and your future Cases will be covered by your UserEvent, that would be better than a Hacky Client Side script.

Now I'm officially intrigued, can you provide an example of how that will work Client Side and not Server Side?