After the latest build of FSUIPC, it seems it is now possible to assign everthing in the SDK through Linda with LUA. I just worked out the Chrono ET with the help of the SDK documentation - I've been after this function for a while now...Should be pretty straight forward to add the rest of the Chrono.
function NGX_LEFT_CHRONO_ET ()
ipc.control(69953, 536870912)
end
A little later...
function NGX_LEFT_CHRONO_RESET ()
ipc.control(69952, 536870912)
end