[Q] Upadate driver in UBOOT.of MT6577

hi .. I would like to integrate a driver for a camera in a uboot.bin, what can you do?
I'll explain:
N7000+ has Android 4.0 anche chipset mediateck 6577
latest versions are 4.1,1 but it 's changed the camera ...
if I upgrade everything works except the camera,,,,
the uboot.bin of 4.1.1 does not have the drivers for the old camera....
how can I remove them from the old uboot.bin and put back in new uboot.bin?
i have found script for unpacking boot and recovery... but no for uboot.bin
thanks a lot