i tried to install snow leopard universal on my dell xps 430 but no HDD is recognized and also my DVD and usb............

i want help please.......

my config
intel core 2 quad Q8200 2.33Ghz
intel x48 chipset
Ati HD 3650 265 Mo
Ram 3Go DDR3
wd 500 Go
seagate 500 Go