Install Windows XP on Compaq Presario CQ40-145tu

you can download the windows XP drivers here

Here is the guide to install XP,

First make vista backup:

Prepare this material:

Download Nlite: Download

Sata controller: Download
32-bit Floppy Configuration Utility

A blank CD

You have to create a new windows XP CD using the one that you have:
Here is the guide to slipstream: GUIDE