Hi,
A progress bar subscribes to the SetProgress ControlEvent, but it can also subscribe to a ControlEvent named after the action being monitored. Therefore, you can try to edit the MSI with Orca and subscribe the custom progress bar to a ControlEvent with the same name as your custom action. However, I'm not sure if this will work.
A better solution is to affect the main progress bar of the installation. Please note that there is another thread which may help you:
http://www.advancedinstaller.com/forums ... f=2&t=3968
Regards,
Cosmin