Extension talk:AuthorInfo

In AuthorInfo.php I needed to change the 6th line:

$wfAuthorInfoPath = $WPI_URL . "/extensions/AuthorInfo";

without the $ before WPI_URL the path to the javascript was wrong so the extension failed.

Help implantating please

I don't understand where exactly I'm supposed to add

<AuthorInfo limit="4"></AuthorInfo>

Please advise!!!