I am confirming here the presence of PrKERNELv4 core in Kodak Zi8. I analyzed the firmware and found the core with all PrKERNELv4 functions and files inside the firmware.
Also PrKERNELv4 is ARM based in Kodak Zi8 so for the decompilation of firmware files we need to select "ARM" in IDA Pro for correct code display.
ARM assembly codes syntax are a little different from normal assembly codes we come across, so I think it'll take some time in making the exact modded firmware.
I also found out in developer mode that the ROM file size in the firmware is 2 MB, so for ROM analysis we need to check the 2 MB code in IDA Pro, still need to work out in finding the ROM start address.
Lastly, the firmware file is most probably a combination of different files such as
1. The boot ROM
2. The data files
3. PrKERNELv4 kernel
4. Null padding
Still searching for vector table that defines the different files in the firmware block.
Will update more later.