hello, i want to set up my mac to allow 3 different users to access there own apps,etc in their own iTunes accounts but also allow them access to a common music folder in users/shared folder, i am the administrator and everything works ok for me. However, when i log on as someone else i am getting messages saying there are 'privilege errors' . i've checked the apple documentation and it suggests changes the music folders read/write privileges with unix command sudo chmod -R 1777 /Users/Shared this makes me a little nervous... As anybody else done this successfully? , and another thing troubling me is.. i now believe there will be a set of .itl and .xml library files in each iTunes user account , how do all these keep up to date and synchronise with each other?. if say user 1 adds to the common music library , and then user 2 adds something else ?,etc. , do you see my concern?