splitter.bz is a virtual file, backed by the physical file splitter.jsp. By default, the splitter checks the user’s session object for the BzW2hUserDataRow object. It calls BzW2hUserDataRow.getUserSite() and BzW2hUserDataRow.getUserPage() and builds the URL to the BlueZone launch page, and then forwards the user to that page, from which the BlueZone emulator is actually launched. You can modify the logic in this file, or perform additional data lookups to direct the calls to the desired launch page.