It would be nice to know the processor that you are targeting and the tools (not the IDE) version. I will attempt an answer, though.
1) Bring up the Project Settings panel. (Alt+F7)
2) Select the Target Settings panel.
3) For the Post-linker option, choose BatchRunner PostLinker from the drop-down menu.
Under the Linker group at the left, a BatchRunner PostLinker entry appears.
4) Choose the newly-visible BatchRunner PostLinker settings panel.
5) Under the Select the Batch File that You Wish to Have Run After a Success Link, click Choose and navigate to your batch file.
6) Click Apply to save your changes.
---Tom