There are many times you want to use a USB hard drive to move files between, for exmaple, Vista, XP, Unix, and MacOS. A drive is formatted with FAT32. Files are added and removed under MacOS and XP and Unix. When viewing the drive on Vista, some of the permissions are very messed up. It cannot access some files or directories. It says some are "shared" and thus can't be deleted, while others are unreadable because they are owned by different users. Everything looks fine on the other OSs.
What is the easiest way under Vista to say "look, just make everything on this drive readable and deletable, OK?". This is a Vista system with just one user.