So do I just put the XP install CD in the cd rom drive
Yes, but set CDROM as first boot, HD as second. Read the screen text carefully and follow directions. When formatting HD select NTFS option, quick format. After install, insert motherboard driver CD and install onboard chipset drivers then videocard driver etc. Reboot when requested. Install your antivirus software before connecting to Internet and then let it update when you are connected.