To install new TS-BOOTROM:

*) Copy tsbootrom.bin to your board
*) Run the command: "dd if=tsbootrom.bin of=/dev/mtdblock/0"

To install new RedBoot:

*) Copy redboot.bin to your board
*) Run the command: "dd if=redboot.bin of=/dev/mtdblock/2 bs=256k count=1"

(RedBoot occupies the first 256KB of flash at /dev/mtdblock/2.  The rest of the redboot.bin file contains the kernel binary and default redboot "fconfig" settings)