Hi franky
It was unnecessary to perform the workstation installation on station A, but unless you did something very unusual, there's no harm done other than wasting time.
You should never install Adagio from the server itself, so you're OK there.
My present source of confusion is why you mention a G: drive and a Q: drive. For Adagio to work properly, all workstations must be mapped to the network drive using the same drive letter.
Steve