re-installation of XPS 1640 keyboard

SO I was an idiot and spilt a drink on the keyboard of my XPS 1640 keyboard. It resulted in spamming letters at me when i wasn't typing and succeeded in making my life slightly more frustrating. anyway, so i decided to uninstall the keyboard through the use of a USB keyboard.

But instead of cleaning the keyboard out i was content using the uncomfortable usb keyboard.... so i just cleaned out the keyboard on the laptop and i'm wondering whether it should be ok now, but i cant seem to re-install it (i think i left the driver disk at my dorm in another state) and the online driver support doesn't list the keyboard driver (or at least i don't think it does...)

so basically how can i use my keyboard again?