Screenshot saving in USB drives

Hi,
I´m using a PC running Stepmania 5 (last version) on an DDR cabinet vía a JPAC.
I´ve recently configured USB profiles & saving and it works like a charm.
But there´s something I still don´t know how to do: when playing with our USB drives, we want to be able to save screenshots of our scores in our USB drives instead of having them saved in the /Screenshots Stepmania install folder on the PC. For example, having a screenshot of our scores by pressing the two yellow buttons on the front panel simultaneously.
Currently we can only save them using PrintScreen. But the goal is to somehow "map" this key to any of the buttons on the front panel to take the screenshot and then have it saved on the USB drives.
¿Any clues on how we can do this?
Thanks in advance,

Pressing Select or MenuLeft+MenuRight on the evaluation screen should put a screenshot in your profile folder.

Pressing (...)MenuLeft+MenuRight on the evaluation screen should put a screenshot in your profile folder.

Thanks for your reply, however, this never worked for me.

Just FYIA in case somebody is looking for the tip:
I had to manually edit the theme metrics to force the Codescreenshot to be invoked by just holding MenuLeft instead of Select.
Also, I was missing the correct screenshot storage paths for P1 and P2 on the metrics.ini.