arduino librery pen drive for USB HOST shield

i have a usb host shield (spark fun or oleg - doesnt matter) i want to connect to it usb disk on key drive (4GB) i dont want to use SD shield and i am tired of waiting for oleg to do so so i want someone who can write this librery (may consist on arduino uno SD librery) so in the end i shall be able to read/write to usb flash drives with arduino uno ELEMENTARY WATSON?