How can i add a USB printer without the product software at all even from the site or disc, XP? -

See if Windows has a generic driver that will work for it. If not, then you can t. Connect the printer and see if Windows can install a working driver through the Found New Hardware Wizard that pops up. If you get any message to the effect of could not install new hardware or there s a problem with new hardware then you re out of luck and will need those drivers from the manufacturer.