Putting the new files in RttR was not an issue. Naming the folder "jobs.bob" worked just fine here.
The problem is how to put it into the orignal game.
About the Sergeant bug itself, to show what I'm actually talking about the following picture shows the error and how I fixed it:
: walking direction "straight right"
: walking direction "diagonally upwards to the right"
: My new Sergeant sprite with the General helmet crest
: The old Sergeant sprite with the Officer helmet crest (which is wrong because it should be the General's)
: for comparison, the General: this is where I got the crest for my new Sergeant sprite from
: for comparison, the Officer
The sprites that I changed in that way are the following:
These are the walking animations for the two walking directions that have the error. (for the diagonal sprites I also had to adjust the Y axis for the game to display them correctly because the sprite is slightly bigger; for this I also used the General sprites as a basis)
In all other walking directions and battle animations the Sergeant has the correct crest. (General's version) So nothing had to be changed.
Now how could this error have occured in the first place?
I guess the devolpers just copy-pasted the different parts together and screwed up by using the wrong crest here and never bothered fixing it afterwards.