Well i've never done one of these before, but... is this at all to your liking Bob?
If so i can post my PSD file here for anyone who wants to look at it. This effect is only slightly more involved than a normal shiny glass ball effect. Although in fact, the lighting wouldn't really look the way i've made it here. But i think it looks nice like this so, what the hey. [honesty]
You can edit/alter the PSD file to your liking if you feel you can't grasp how to make the effect. In that case consider this a Xmas gift from me.
If however anyone has any questions about the layers within the file, just ask. :B