You can format the hard drive in this PC, provided you boot from CD ROM using the XP CD, when it gets to the installation, click esc to install without repairing, press D to delete the existing partition, type L to confirm, press enter, leave it set to its default format, NTFS Long which will take about a minute per GB of hard drive size.
If this is the way you already did the format, look for the manufacturer's set up utility for the hard drive, check it has the option to write zeros to the drive, again, use the full option, which would take 8 hours for a 200GB Drive
You will be able to download it to any PC, save it to CDR and load it from there on to the PC you want to install XP on
Most hard drive utilities are ISO image files, if not, you would need to use Nero / Roxio to burn the file as an ISO image
You can also use UBCD which is an 121MB download, but has lots of utilities, several which will format the drivehttp://ubcd.sourcefo...t/download.html