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This explains how to obtain the Pikachoose addon, and to share extra commands like speed and transition effect. Please share other commands if you see something not listed.

Download the Lightbox addon for WB8: http://www.wysiwygwebbuilder.com/free_extras.html. When using a Slideshow or Photo Gallery on your page, to access Pikachoose go to Options > Type > Lightbox Gallery. Then set the Lightbox to pikachoose.

To customize pikachoose, add any of these to "Settings" (separate each variable with comma like shown):

showCaption:false,
transition:[0], (0: fade out then fade in, 1: full frame cross fade, 2: paneled fold out, 3: horizontal blinds,
4: vertical blinds, 5: small box random fades, 6: full image blind slide)
autoPlay:true,
speed:3000, (slider speed in ms)
text:{ play: "Play", stop: "Stop", previous: "Previous", next: "Next" },
showTooltips:true,
showCaption: true,
thumbOpacity:0.2,
animationSpeed:3000, (in ms and only applies to transitions 0,1,3,4,6)
thumbChangeEvent:'mouseover.pikachoose', (forces app to change images on mouseover)
hoverPause: false,
carousel:true, (activates jcarousel)
carousel:true, carouselVertical:true, (activates vertical jcarousel)

This is only available in WB8 - another great reason to upgrade if you haven't already.