A very important file which is accessed and saved frequently has disappeared off of a friends PBook. I am going to see if I can't recover the file for them, but after using some sort of utility, I am not sure what else to try. She's certain it wasn't deleted, or thrown in the trash. Could it somehow have been marked as an invisible file? Any suggestions would be greatly appreciated.
BTW, 1.33Ghz, 12", G4 PBook w/ 10.3.8