Yeah its really no different than a 3560 other than you have multiple places you can put the image such as bootflash or disk0 or slot0: . Then make your boot statement match where the image is located . Just make sure you understand where you put it , your msfc bootflash and supervisor bootflash are different . If it fits use the supervisor bootflash because the supervisor portion boots first then hands off the boot process to the msfc for the layer 3 side . the boot statement should point to either supervisor bootflash or slot0 or both if you put it in both locations . In some cases now the 720 image is getting so large your only option will be slot0 as its the only thing big enough to hold the image . It really has gotten to the ridiculous point when an image is 80 megabytes in size and takes 8-10 minutes to boot .