Why you think you need to wait for SU10 to set the Passenger Number ? Nothing in SU10 will have any effect on that, there are 3 different ways to have the Passenger number and are:
- By letting GSX automatically estimate it from the Payload at the moment of boarding. Page 14 of the GSX Manual explains how this calculation is made.
- By using a 3rd party airplane that has been programmed to communicate the passenger number to GSX, setting the appropriate variable. Page 61 explains how developers can control this from their own code.
- By filing a flight plan on SimBrief, which GSX will query using your SimBrief username to download it and use it to set several things, with the Passenger number being of of them. Page 60 of the manual explains in detail how this works.