The Real String Behaviour patch by Xavier Bidault is available as a free download for the PMI Bos290 PLug-In. This multi opens 6 slots in the player to create a stunning realistic pedal behaviour!
Direct link to the B290PlugInVs6 update:
To install the update, simply unzip the file and copy the Multi folder inside the Library folder, usually located: YOURDRIVE>EASTWEST>Boesendorfer290>Boesendorfer 290 Library>...
Let me know how it works!