Kirupas scrolling thumbnail gallery help

heyhey, im using the kirupa scrolling thumbnail tut…
but i have a bunch of pics and theyre all in larger dimensions than the previously used ones in the tut ><

is there a way to resize them automatically when theyre loaded into the MC? like, a script that would load them as 320x240 rather than 640x480 or whatever? or do i have to resize them all manually in photoshop t.t

thanks
-kap

edit
i realised there is already a method for doing the actual images, as posted in THIS POST, however… i was wondering if there was a way to do the same thing for thumbnails too?