Progress Explorer Tool (PET)

I guess 2 issues here....

When starting/stopping the Application/Task/Process servers, and
stop/start the database(s)in PET, what commands or scripts are being
run behind the scenes to perform these functions? We have Progress
(10.1B SP2) and Vantage both installed on a Suse Linux server.

We are currently on 8.03.400C. Been doing some testing in the PET
stopping and starting the servers and the databases. Found an issue
that when we start a database, but DO NOT start the app servers, we
can still log into a Vantage session (clients are MS XP desktops). If
we stop the database, then we cannot start a session (makes sense...).
Anyone else run across this??