Installing new HD - Formatting?

I'm going to purchase this HD (what seems to me a very good deal, though if someone sees a problem with it, tell me), but I have a question: I'm going to set it up as a primary slave drive, and I am running an XP home system (no disk, it is a Vaio), but when I install it, will Windows format it, will I need a disk (dl software or provided with HD)?

Once again, any help/suggestions/comments greatly appreciated.

Always cautious when I see deal this good ($50 for 120gig HD )

 

If that doesn't happen, you can go Start --> Run --> "diskmgmt.msc". Then right-click the "Unpartitioned Space" on what should be Drive 1 (Drive 0 should be your C: drive). Choose Create Partition from the drop-down menu. Choose Primary Partition, and the next step of the Wizard should offer to format it for you. You can also choose the drive letter you want to give it.

If the disk doesn't show up in Disk Management, then it is likely that the BIOS hasn't detected the drive, and you need to check your BIOS settings and the jumper settings as well as ensure the cables are connected properly and securely.