dear all! i desperately need some advice. i just received my new 1.5G 15" powerbook yesterday. the thing is, i am quite skeptical of my apple store. I have upgraded my powerbook to a 1X512 ram and 5400RPM hard drive, and also a 128mb graphics card. I insisted on checking the powerbook they sent to me, only to realised that they haven't upgraded my ram from 2x256 to a 1x512 one. i went back to the apple store and got that replaced. Now the thing is, how do i check if my ATA harddrive is upgraded to a 5400 RPM one? and how do i check my graphics card is a 128 instead of a 64 one? the saleman at the store said theres no way i can check that the ATA harddrive is upgraded. is that true? I am losing faith in my apple store and i REALLY need so valuable advice! HELP!