Start your PC and hit delete to enter bios setup and change your boot order so your CD ROM boots first then exit with saveing your changes and reboot your PC with the Windows XP HOME dics in the Dics drive. Select Enter setup windows XP Home... Once it gets to the screen that says something like hit ENTER to contiue or hit R to repair... just hit ENTER. Select the Partition you want to install XP on and Hit D to delete the current data on the partition and confirm by hiting L. Now select the unpartitioned space and hit C to create a pariton and select how much of your hard drive space you would like to use. Then select the partition you just made and hit ENTER and select the quick format with NTFS option once it has finished formating and installing the setup files the computer will restart just hit exit when it asks if you want to setup windows XP Home(you will have to go back into the bios and change the boot order so your harddive it first after). The rest should be fairly simple just follow the instrustiong they give you and you will be fine.

Also you should make sure you have all the drivers for your computers hardware such as your Chipset, Video driver, Sound driver, and Network Adapter driver.

How that helps it may be a little different but thats the best i can do off the top of my head. 

Good luck.