one job, multiple files, one directory

Is there any way to split a job into multiple files, not including the "designate one directory as a working job directory for everything" ?  I want to keep each job's files in separate directories, but linuxcnc doesn't seem to look in the same directory as the calling file, for subroutine files.
I really just need to do a series of G92 (or G10L2 etc), run file A, G92, run file B, etc.
 

No, it's more like I have a production run for a customer and I'd like to batch up 4 jobs at a time on the bed, but each job has its own gcode file.  So I need a script that runs each gcode file with the right work offset for each of the 4 setups.

(in this case, it's two parts for a chair, each part is different on both sides, and each pair of parts is a mirror image of the other, so four gcode files - but two runs produces four finished parts)

I expected to find some easy way of "batching" jobs like this, without mixing files from different jobs together on disk, but didn't.  Also, my memory is not good enough to trust doing any part of this manually, I want all the commands to be in one "project" gcode file that I can just run and it does the right thing.

And yes, I could have each setup be a different G54 et al (assuming few enough jobs that there are enough G5*) but I still need a way to run all four of them without having to go to the machine and remember which one is next.
 

You can call offsets and subroutines with a variable:
Just some example

;select G54
#<ucs> = 54
G#<ucs>

;select from G54 to G57
#<job> = 0
o100 REPEAT[4]
#<job> = [#<job> + 1]
#<ucs> = [53 + #<job>]
G#<ucs>
o100 ENDREPEAT

and you can call numbered subroutines

#<job> = 1
#1234 = #<job>
o#1234 call

and the subroutine would be
1.ngc

o<1> sub

your code

o<1> endsub
M2

It should be possible to assign offset and call the required subroutines with variables