If you do not have a valid boot image, you will be hating life soon. See the pasted document:
MikeS
Loading the Boot Image
If the router contains a valid boot image, it can be used to download a valid Cisco IOS Software image into the Flash using TFTP. To do this, perform the following steps:
Change the configuration register to boot the boot image by setting the configuration register as follows (depending on the prompt you have):
rommon 1 > confreg 0x2101
or
> o/r 0x2101
You must reset or power cycle for the new configuration to take effect.
!--- This is the router output when a confreg command is entered.
The configuration register has now been changed to boot the boot image.
Boot the boot image by resetting the router:
rommon 2 > reset
or
> i
The System Bootstrap message appears and the router boots its boot image. On the screen, you should see something like this:
System Bootstrap, Version 11.1(7)AX [kuong (7)AX], EARLY DEPLOYMENT RELEASE SOFTWARE (fc2)
Copyright (c) 1994-1996 by cisco Systems, Inc.
C1600 processor with 18432 Kbytes of main memory
program load complete, entry point: 0x4018060, size: 0x1da950
Restricted Rights Legend
...
You should now have a prompt similar to "Router(boot)>".
If you are still in ROMmon, that means your boot image is either missing or corrupted. If your router has no valid image in Flash or Bootflash, and no other ROMmon upgrade procedure, the only way to recover is to have a similar router with a compatible Flash card, download the image on that router, and then move the Flash card to the one that is stuck. Find me at
"Take advantage of the enemy's unreadiness, make your way by unexpected routes, and attack unguarded spots."
Sun Tzu