Controller macro functions, similar to Kawaks emulator?

[slimmbo]

Hello, thank you for taking the time.

I used to do all my retro gaming on my computer but recently converted a RPi 2 B board to a retro emulationstation center.
Most of the time all is well, however, because of the awkward button positions on the Xbox controller I usually use macro binds - available in a lot of emulators for win32/64 arch.

Several actions bound to single trigger, possible?
I have been unsuccessfull in finding any docs or clues in the configurations that would allow a button, let's say Left Trigger, to be bound to several actions such as the CD button combination used for special movies in Samurai Showdown, amongst others.

I wonder:
Is there a way to bind these otherwise rarely used buttons to several actions, or macros and if so, how/where?

I would really like to use the shoulders and triggers on both sides for macro binds.
I have spent quite some time looking for this and while there's a lot of stones left unturned I figured I'd
save some time by sharing my quest with the lovely gamers here.

//Slim.