Why can't I see my Hardrive for my compaq mini 110c from A windows Xp installation on usb stick?

Why can't I see my Hardrive for my compaq mini 110c from A windows Xp installation on usb stick?

I have windows xp installation files on a USB drive using wintoflash. I've downloaded mass storage driverpack and slipstreamed them into the install. when the bootup begins I press f6 at the appropriate screen to enable sata drivers for my harddrive. Then it comes to the partition/harddrive selection screen, I only see my usb flash stick. I'm at my wits end with this problem. I need to install xp.