A friend just called me up, hes home from boarding school, and has an old iMad (the colored one) that hes gonna give me. Its got tiger, and pretty basic internals. Is there anything that i can do to up the performance? As far as hooking up an extra internal HD (i tihnk i've got an 80gig), or getting another mobo/processor ram etc and making a decent computer? Could i put in an airport card?