In windows XP you can enjoy a good feature to run CD or DVD automatically when you loaded it into you CD drives on your computer. In user interface mode there is no option to disable or enable this feature, you must edit the registry of windows and be careful to work registry.
Click Start button then type regedit in Run option then press Enter for next.
Here locate the location to:HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesCdrom
Here you can disable or enable automatically running your CD. Change the value of Autorun to 0 for disable and change the value to 1 for enable. At the end restart your computer for this change.