I just found a great deal on an internal HD. I have an older 15" Powerbook, 1 GHZ, with 2 GB of RAM. The HD is by Fujitsu, 120GB, 5400 RPM, 2.5 inch, 8 MB cache. Model # MHV2120AH PL, Would this work on my PB? I need to find out soon before I leave! Thanks!!