FTP Setup On Windows 2003 Standard

Im trying to setup FTP on Windows 2003 Standard. Multiple people will need access, the problem Im having is how do I make it to where certain ftp accounts only have access to certain folders and certain ftp accounts have access to the whole root directory of that folder?

For instance under websitefolder you have a folder called bobsfolder. I want bob to login and just be "jailed" to bobsfolder, but when websitefolderadmin logs in they have access to the root of websitefolder and all its subfolders.