[dgerson]

Answered my own question...

A: Boolean search is enabled in the Usergroup settings and requires full text search to be on. See this post
Q:

Anyone using this hack with VB3.5.4 and MySQL Full Text Search? I edited Search_Forums and couldn't find the original code:

PHP Code:

                <div style="padding:$stylevar[formspacer]px">

                    $vbphrase[search_type]

                    <label for="rb_searchtype_0"><input type="radio" name="searchtype" value="0" id="rb_searchtype_0"  $searchtypechecked[0] />$vbphrase[natural_language]</label>

                    <label for="rb_searchtype_1"><input type="radio" name="searchtype" value="1" id="rb_searchtype_1"  $searchtypechecked[1] />$vbphrase[boolean]</label>

                </div> 


When I inserted the replacement code into the template, it appeared as it should on the Advanced Search Page, but didn't seem to work.