[Overgrow]

(This is untested) Make your changes to the top variable and...

Find:

PHP Code:

if (eregi("[a-z]",$forumID) or $forumID < 1 or 
strstr($privateForums,"|".$forumID."|")) 


Replace with:

PHP Code:

if (eregi("[a-z]",$forumID) or $forumID < 1 or 
!strstr($privateForums,"|".$forumID."|")) 


Find:

PHP Code:

while($pf=array_shift($pfs)) {
        if(ereg("[0-9]",$pf)) {

            if($wherecounter==0) {
                $whereclause= " WHERE forumid!='$pf'";
                $wherecounter++;
            } else {
                $whereclause .= " AND forumid!='$pf'";
            }
        }
     } 


Replace with:

PHP Code:

while($pf=array_shift($pfs)) {
        if(ereg("[0-9]",$pf)) {

            if($wherecounter==0) {
                $whereclause= " WHERE forumid='$pf'";
                $wherecounter++;
            } else {
                $whereclause .= " AND forumid='$pf'";
            }
        }
     }