To recap (for me

)... the final answer:
(you do not need AutoHotKey)In Sonar bind key "
Num-" to
Rewind (actual list name is "Start/Stop Rewind")
bind key "
Num+" to
FastForward (actual list name is "Start/Stop Fast Forward")
bind key "
Num Enter" to
Pause (actual list name is "Play/Pause")
You can keep
Space Bar as its default "On Stop Rewind to Now Marker"
And use "
Num Enter"
to pause (stop here! and
don't rewind to Now Marker, damn it!

)
Note: Using Ctrl+PgUp/PgDn direct, or as a binding, for rewind/FF was awful because was not instant or smooth like the real rewind/FF.