I was searching for firmware for my old Asus WL520gu router, and I came across this page: http://tomato.groov.pl/tomatoanon.php?model=Asus WL-520GU Here it is listed that people installed "112 K26 USB" "Big-VPN" onto the Asus WL520gu router. How is this possible? The flash memory for this router is only 4 MB while the file is 7.2 MB. Should this not brick the router? How am I supposed to interpret this website?