yep, you can edit [your own] postings on the new forum...
Adding a new drive is e-z, just open the computer case and look where the other harddrive is. Now usually the [flat]cable connected to the HD has another set of openings to plug into your new drive.
-> top cable: floppy drive
-> second: newer / faster UDMA HD cable
-> third older HD cable
You see the black and blue parts on the flat cable, well that's where you connect your stuff:
Now this is how to connect everything:
Master = your main drive, the one you already have
slave = your new [100 bucks ] drive
If somehow you've only got one cable inside of your pc, i.e. your CD ROM is connected to the same cable. get yourself a new cable and connect the cd rom to the new one and the two drive to the cable you already have...
U C, e-z
good luck... if i were you, i'd buy the new drive ....
BTW don't forget to connect the power connector to your drive
some more info:
hgst.com/hdd/support/cabling/deskstar.htm