I think.. vbulletin-core.js needs the yui lib.. and also the init in footer is bound to check for it...
(not sure.. but check it out.. do a fetch_object(some id) in your code.. (that uses the main vbulletin js..)
if that works after removing the yui then you can do it.
PS i wouldnt.. check out the yahoo dev pages.. there is a simple beginner tutorial for the ajax stuff. IMHO its easier to read through 3 pages, that to mess around with the vbulletin core stuff..)
F.
|