The simplist way is to have, at the beginning of each scenario a choice of where to go next based on reading in a configuration file.
As QTP runs, afer the reboot, it reads the config file (just some text lines) and launches the correct scenario and then the Scenario decides where to continue from through the choice it also reads from the config file.
Just before you reboot create the config file and put in it the scenario to run and the place to run from along with any persistant variable info you want to carry over.
I find multiple actions a pain so use library files and functions instead. The different scenarios are different paths through the many functions.
