i downloaded limewire onto my powerbook and one day when i took it into the geniusbar at one of the apple stores, the guy told me that limewire messes up the system so it's really bad for my powerbook and i should stop using it immediately...so i guess my question is...is that true? haha cause limewire is the only firesharing program i can find for macs x-X so i just want to know if there are better programs out there? or if limewire is reliable (safe)? =) thanks!