Correct HDD For This PowerBook?

I know I'm suppose to buy an PATA, IDE HDD for my powerbook, however Amazon.com is confusing me.

I saw this listing:

"Western Digital Scorpio Blue 500 GB Bulk/OEM Hard Drive 2.5 Inch, 8 MB Cache, 5400 RPM SATA II WD5000BEVT"

I felt fairly comfortable buying this drive, yet concerned by the SATA in the description.

In one of the reviews the writer said they had a "MacBook Aluminum (13" - Late 2008)" and this drive did fit their powerbook.

They even finished by saying "I am extremely satisfied with this drive, and would definitely recomend it to any MB/MBPro owner who wants to upgrade the hard drive."

My question is I know I want a 2.5" drive that's also a PATA, IDE. So will this 500GB drive truly fit my 1.67MHz 15" powerbook?

And when I'm looking at other drives is it more important to watch for 2.5", PATA, or IDE? And if they don't break it down that much what should be the main factor to look for?

Thanks MackDog