If you want simple solution follow the steps
Step 1: Start Your PC.
Hit F2 at startup then you will be led to BIOS, in BIOS Setup, change SATA mode from AHCI to ATA and Save and Exit.
Step 2: Insert XP CD in CD/DVD Drive
While booting hit F12 and choose Boot from CD/DVD drive. Then follow the usual procedure to install XP.
Note : It should work for any laptop/pc. I did this for "Dell Inspiron 1525" Laptop