Si grazie...

In effetti nel template c'è questa istruzione :

<font face="Verdana, Arial, Helvetica, sans-serif"
color="#999999" size="1">{PAGE}


Assegnato da index.php con:

$ftm=new FastTemplate("");
$ftm->define(array('main'=>"main_template.html"));
$ftm->assign('PAGE',$page);

dove in pratica (in page!) viene richiamato questo:

<table border="0" width="300" id="table3" cellpadding="2" cellspacing="3" background-repeat= no-repeat>
<FORM METHOD="POST" ACTION="listings/index.php" NAME="input" onSubmit="return getMakeModel()">
<font size="1">
<input type="hidden" name="pag" value="car_list">
<input type="hidden" name="quick_search" value="1">


<INPUT TYPE="hidden" name="make" value="">
<INPUT TYPE="hidden" name="model" value="">
<INPUT TYPE="HIDDEN" NAME="cur_year" VALUE="Any">
<INPUT TYPE="HIDDEN" NAME="cur_make" VALUE="">
<INPUT TYPE="HIDDEN" NAME="cur_model" VALUE="">
<INPUT TYPE="HIDDEN" NAME="cur_ext_color" VALUE="">
<INPUT TYPE="HIDDEN" NAME="tipologia_id" VALUE="">
<INPUT TYPE="HIDDEN" NAME="alimentazione_id" VALUE="">
<INPUT TYPE="HIDDEN" NAME="country" VALUE="">

</font>

<tr>
<td align="center" valign="top" bgcolor="#0A87AC" width="400" colspan="2">
<font face="Verdana" size="2" color="#FFFFFF">Cerca un auto</font></td>
</tr>

<tr>
<td align="center" valign="top" width="200">
<font face="Arial" size="1">Tipo</font></td>
<td align="center" valign="top" width="200">
<font face="Arial" size="1">
Anno di costruzione</font></td>
</tr>
<tr>
<td align="center" valign="top" width="200">
<font size="1" face="Arial">
<select name="tipologia_id" class="verdanaBlackSlim11" size="1" style="border: 1px solid #8CDFFB">
<option value=''>Tipo Auto</option>
{TIPOLOGIA}

</select></font></td>
<td align="center" valign="top" width="200">
<font size="1" face="Arial">
<select name="year" onChange='populate_models();' class="verdanaBlackSlim11" size="1">
<option value='Any'>Qualsiasi</option>
{YEAR_LIST}
</select></font></td>
</tr>
<tr>
<td align="center" valign="top" width="200">
<font face="Arial" size="1">
Marca e Modello</font></td>
<td align="center" valign="top" width="200">
<font face="Arial" size="1">Alimentazione</font></td>
</tr>
<tr>
<td align="center" valign="top" width="200">
<font size="1" face="Arial">
<select name="make_model" class="verdanaBlackSlim11" size="1">
<option value='Any:Any'>Marca/Modello</option>
{MAKE_MODEL}

</select></font></td>
<td align="center" valign="top" width="200">
<font size="1" face="Arial">
<select name="alimentazione_id" class="verdanaBlackSlim11" size="1">
<option value=''>Alimentazione</option>
{ALIMENTAZIONE}

</select></font></td>
</tr>

Insomma è come s enon riuscisse a passare il parametro PAGE , HOME ecc....