No, unfortunately that PST file is just an Outlook file that has contacts, calendar and email information. It doesn't sound like anything else had been backed up. The technician should have warned him before wiping his drive, but it's also very important to perform a backup before getting it repaired.
He also has an iPod loaded with music, and wants to get the music back from that. Leo says not to sync the iPod because iTunes will ask to erase it when he connects it to the computer. He should try a program called Senuti to restore music from the iPod to the Mac.