Yes that's the file he's taking about.
See this part in that file?
Code:
function menu($maindownload) {
global $prefix, $dbi, $user_adddownload, $module_name;
OpenTable();
echo "
<center><a href=\"modules.php?name=$module_name\"><img src=\"modules/$module_name/images/down-logo.gif\" border=\"0\" alt=\"\"></a>
";
echo "<form action=\"modules.php?name=$module_name&d_op=search&query=$query\" method=\"post\">"
."<font class=\"content\"><input type=\"text\" size=\"25\" name=\"query\"> <input type=\"submit\" value=\""._SEARCH."\"></font>"
."</form>";
Just below it is where you want to add your echo statement to echo your message.
Like this
Code:
echo "<center>You cannot use ANY of our themes with the stand-alone <a href=\"http://phpbb.com\">phpBB</a>.
"
."We are now releasing theme packs for Nuke6.5 as well as some other files for Nuke6.5, but MAKE SURE you download"
." the CORRECT theme pack and or files for your system!!!
</center>
";