if you want to know if everything is fine, you simply have to create a /test/ vbulletin, installing your own vbulletin in a place where only you have access to...
i did not install your script but you'll have to make some template changes...
Code:
src="./images/chess/wR.gif"
have to be changed to
Code:
src="$vboptions[bburl]/images/chess/wR.gif"
to have correct urls everywhere (vbSEO would crap this out for boards with vbSEO)
also, make everything phrase based... so people can translate your tool without asking you each time...