Brunos Marcos Star Wars games: (Can the fire buttons be remapped)?

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"The Battle of Endor" and "The Battle of Yavin" games are nice but it does not seem I can remap the fire buttons so I can try to play them with a real Star Wars yoke controller.   The games initially default to use the mouse as the controller in which the left and right buttons are used to fire.   I can switch from "mouse-mode" to use "joystick-mode" but can not figure out what keys are used to fire in joystick mode.   It seems while in joystick -mode, then the mouse left/right buttons are still used for firing ..... 

Key mappings are provided for boost settings as well as toggling stuff off/on, but not the firing of the phazers (sp?).   

Has anyone played these games with a yoke?

http://www.bruneras.com/