I need help on swapping out my HDD in my Dell Inspiron 8600. I have worked on desk computers, but never on a laptop. My current drive is a Hitachie Travelstar 2.5” 4200rpm, ATA-6, 40 gig -OEM. I am looking at either another Hitachie or a Seagate.. I want to install a 60 to 80 gig, 7200rpm, and then put my current 40gb in an external box. My questions are: 1) Are laptop drives universal, that is will any 2.5” HDD fit? 2) From my limited research going from 4200rpm to 7200 rpm will generate more heat and take more power (power on my AC adapter). Will this be a problem? 3) I have seen on this site that not all external enclosures work with TI. Can someone recommend an enclosure for my 2.5 drive (own power supply) that will work with TI8 and 9? 4) Are there any additioal cables i will need? I have read enough to know how to setup the new drive once it is installed. Thanks in advance for any help.