Yes, although you need several different programs for this to work correctly. You have to run hw3patch first, and then run GhostBuster on the program. hw3patch (Hardware three patch) unlocks some of the data available on the calculator, and GhostBuster simply patches the programs themselves.

These programs are only intended as a temporary solution until the program author (hopefully) makes their programs fully compatible with the 89t. Also, please keep in mind that both hw3patch and GhostBuster require the user to read their extensive documentation before attempting to run them, as they require some special syntax to run, among other issues that you'll need to learn about.