I'm trying to upgrade the IOS software on a 2801 router. The latest regular release I could find available is the 12.4(22) release and then there is the 12.4(23) maintenance deployment. My question is this...is the maintenance release an image of it's own or does it patch the previous image (like 12.4(22)) that is on the router? I wondered if it was an imqage by itself because it's a good 10MB smaller than the 12.4(22) ED release but it is a .bin file so I'm unsure how to apply it so that it patches the previous image (if that is indeed how it needs to be deployed). Help?