Put the Xp cd in the drive and boot the comp.( laptops are usually set to boot to the cd drive) If it starts to install then just follow the screen prompts. The only question then is where you get the drivers for the laptop. Usually they are on a separate disc that comes with the machine. I looked on the Toshiba site and could only find this.
http://www.csd.toshiba.com/cgi-bin/t...sp/askIris.jsp