JQuery adding keycode to navigate spacegallery

[StealthRT]

Hey all i am in need of some help trying to figure out how i can put a keycode inside the Spacegallery jQuery javascript so that i dont have to use my mouse to navigate through the images. I would like to use the Down Arrow key on the keyboard to take the place of the mouse clicks.

The Spacegallery can be found @ http://www.eyecon.ro/spacegallery

Here's the part of the code that forms the click event for the images.

                        init: function(opt) {
                                opt = $.extend({}, EYE.spacegallery.defaults, opt||{});
                                return this.each(function(){
                                        var el = this;
                                        if ($(el).is('.spacegallery')) {
                                                $('<a href="#"></a>')
                                                        .appendTo(this)
                                                        .addClass(opt.loadingClass)
                                                        .bind('click', EYE.spacegallery.next);
                                                el.spacegalleryCfg = opt;
                                                el.spacegalleryCfg.images = el.getElementsByTagName('img').length;
                                                el.spacegalleryCfg.loaded = 0;
                                                el.spacegalleryCfg.asin = Math.asin(1);
                                                el.spacegalleryCfg.asins = {};
                                                el.spacegalleryCfg.tops = {};
                                                el.spacegalleryCfg.increment = parseInt(el.spacegalleryCfg.perspective/el.spacegalleryCfg.images, 10);
                                                var top = 0;
                                                $('img', el)
                                                        .each(function(nr){
                                                                var imgEl = new Image();
                                                                var elImg = this;
                                                                el.spacegalleryCfg.asins[nr] = 1 - Math.asin((nr+1)/el.spacegalleryCfg.images)/el.spacegalleryCfg.asin;
                                                                top += el.spacegalleryCfg.increment - el.spacegalleryCfg.increment * el.spacegalleryCfg.asins[nr];
                                                                el.spacegalleryCfg.tops[nr] = top;
                                                                elImg.spacegallery = {};
                                                                imgEl.src = this.src;
                                                                if (imgEl.complete) {
                                                                        el.spacegalleryCfg.loaded ++;
                                                                        elImg.spacegallery.origWidth = imgEl.width;
                                                                        elImg.spacegallery.origHeight = imgEl.height
                                                                } else {
                                                                        imgEl.onload = function() {
                                                                                el.spacegalleryCfg.loaded ++;
                                                                                elImg.spacegallery.origWidth = imgEl.width;
                                                                                elImg.spacegallery.origHeight = imgEl.height
                                                                                if (el.spacegalleryCfg.loaded == el.spacegalleryCfg.images) {
                                                                                
                                                                                        EYE.spacegallery.positionImages(el);
                                                                                }
                                                                        };
                                                                }
                                                        });
                                                el.spacegalleryCfg.asins[el.spacegalleryCfg.images] = el.spacegalleryCfg.asins[el.spacegalleryCfg.images - 1] * 1.3;
                                                el.spacegalleryCfg.tops[el.spacegalleryCfg.images] = el.spacegalleryCfg.tops[el.spacegalleryCfg.images - 1] * 1.3;
                                                if (el.spacegalleryCfg.loaded == el.spacegalleryCfg.images) {
                                                        EYE.spacegallery.positionImages(el);
                                                }
                                        }
                                });
                        }

Any help would be great!!!

David