AddonChat embeds onto any web page, though since it is a full featured chat room and not a simple shoutbox, we recommend giving it it's own page, or better yet, use the popup link option so that your users may chat while they continue to browse your site/forums.
CMPS (vbAdvanced) integration should be fairly simply -- it would just be a matter of editing their menu template to include a direct link to the AddonChat page in your vBulletin forum -- right now though, there hasn't been too many requests for an integration product specifically catered to vBadvanced CMPS -- perhaps in the future if we get some more requests