Dear, i also need to upgrade my cisco 3845 with latest 12.4 T image. the problem i have is, my flash is only 64 mb. When i try to copy the new image to flash using tftp, it says that not enough space, and does not prompt me to overwrite the old image in flash. please guide me, can i erase my old ios image first, and if i do? how will i connect via tfpt if the router has no running ios?