You'll end up with a modified nb file with the dumped Rom code inside
Explanation Of The Above Command Line
I Create imgfs_raw_data.bin File From The OS.nb File Using "aWaiter".
I Take The Part02.raw Of A Dumped ROM And Dumped All The Files Using "viewimgfs" from the imgfsTools
I Then Create imgfs_raw_data.bin From The Dumped Files Using "buildimgfs" from the imgfsTools, This Overwrites The imgfs_raw_data.bin File Created In The First Step.
I Then Merged My imgfs_raw_data.bin With The OS.nb From Step 1 File Using "aWaiter".
I Then Create The .nbh File Using dutty's Rom Koch
Note: the process for Trinity is the same and you can find a more detailed tutorial at Trinity_HowtoReconstruct.
It can be applied to Hermes as well although you should probably use a Hermes OS.nb as shell.