Steps for deploying your custom jpeg VPP-
Create your own custom Jpg VPP, install plugin and activate.
Go to Advanced Configuration > Delivery > Viewers Management and add a new External File Viewer using the same path as the Rosetta JPG Viewer (/jpeg-viewer/jpegNav.jsp?) and connect to your custom VPP.
Create your own file delivery rule using the customized viewer.
Developer Network : https://developers.exlibrisgroup.com/rosetta/sdk/plugins