Sorry for bumping this, but it looks like my troubles with this aren't over; thought I might as well add to this thread instead of starting a new one.
I backed up everything and removed the old drive (and by this point it was making the most absurd computer noise I have ever heard, a continuous high pitched whine that was as loud as a car engine) but when I put in the new one, the computer frequently refused to detect the new drive at all, saying that no primary IDE master existed; it sometimes worked but more often did not. I ended up calling a technician over who eventually concluded that the IDE controller on the motherboard was also defective in addition to the drive, so I got a new one of those too (Asus A7N8X).
Everything was working fine for a few days until last night when the computer inexplicably locked up while I was in Word, and when I restarted it, it once again would not detect the hard drive. This time, I could not even load up the BIOS setup utility; it just froze up right when going into the IDE detection sequence. I borrowed another hard drive from a neighbor and that one worked perfectly fine, so it means that there is also something wrong with this new drive I got.

I am sort of stumped here now; do you guys think I should just try buying another drive and seeing if that works? (this one can still be returned since I got it just a week ago)
These issues are really coming up at the worst time; I am currently working on a math project for one of these national competitions, the deadline is in a week and I still have a lot of stuff to do.
