bootcamp drivers windows xp

after i've created boot camp partition i've installed windows xp sp2 from original cd-rom

after boot in windows i've used mac os x leopard dvd to install bootcamp software and drivers

after restart no drivers are installed, only an icon and a control panel, in device list in windows all the devices are not installed (?! icon)

i've also downloaded from apple BCUpdateXP.exe, after launching it starts the same installing process of dvd, then i restart and no drivers are installed

how can i install these drivers?