Add an Option/98 as an Optional Child to run:

Application ID: 0AD

  Process Type: INPUT

  Process Name: AUDIT INFO

... and in Pre-Invocation ...

SET 0AD AUDIT DATE ADD = 1EX ORDER1 DATE ADD
SET 0AD AUDIT DATE CHG = 1EX ORDER1 DATE CHG
SET 0AD AUDIT USER ADD = 1EX ORDER1 USER ADD
SET 0AD AUDIT USER CHG = 1EX ORDER1 USER CHG

INVERSE

... and in Post Invocation ...

NORMAL

As of 4.0.5, the 0AD INPUT process 'AUDIT INFO' only works if your application is also using version 00. If it uses some other version, then it won't work. If you develop in 00 but use 01 as production, it will work while you test it, then fail when you move it to production.

The process itself is pretty simple. You're better off writing your own, and using the same technique as the 0AD, i.e. display work fields on the screen, and have the calling process set values into the work fields before invoking it.