hi there just got me the new airport express, very cool but some questions.. i have herd that you can set up profiles to save setting for a certain environment such as 'home' or 'hotel room' how do i do this? do i have to keep the airport on all the time to save the settins? i just got mine home from uni and it was working fine there, then just now i had to reset it and start from scrach because the computer could not even find it. cheers!!