head.php에  검색스킬 넣을 자리에 아래 소스를 넣어주면 되거드면 .

 <!-- 검색 시작 -->
<table width="430" cellpadding="0" cellspacing="0">
<tr>
    <td width="51" height="11"></td>
    <td width="347">&nbsp;</td>
  </tr>
<tr>
    <td width="51" height="33"><table width=100% cellpadding=0 cellspacing=0><tr><td width=25>&nbsp;</td><td><?//=popular();?></td></tr></table></td>
    <td>
        <table width="375" height="33" cellspacing="0" cellpadding="0">
        <form name="fsearchbox" method="get" action="javascript:fsearchbox_submit(document.fsearchbox);">
        <!-- <input type="hidden" name="sfl" value="concat(wr_subject,wr_content)"> -->
        <input type="hidden" name="sfl" value="wr_subject||wr_content">
        <input type="hidden" name="sop" value="and">
        <tr>
            <td width="195" height="25" valign="middle"><span id=c2>
              <INPUT name=stx id="stx" style="WIDTH: 230px" accesskey=s tabindex=2 onfocus="return s BACKGROUND-REPEAT: no-repeat" maxlength="20">
            </span></td>
            <td width="8">&nbsp;</td>
            <td width="62"><span id=c3>
              <span id=c3><input type=image src=../images/btn_schL.gif tabindex=3 style="width:55px;height:25px" title="검색" onmouseover="this.src='../images/btn_schH.gif'" onmouseout="this.src='../images/btn_schL.gif'" onmousedown="this.src='../images/btn_schA.gif'"></span>
            </span></td>
            <td width="18">&nbsp;</td>
        </tr>
        <tr>
            <td height="8" colspan="4"><span id=c3>
</span> </td>
        </tr>
        </form>
        </table></td>
  </tr>
</table>

<script language="JavaScript">
function fsearchbox_submit(f)
{
    if (f.stx.value == '')
    {
        alert("검색어를 입력하세요.");
        f.stx.select();
        f.stx.focus();
        return;
    }

    /*
    // 검색에 많은 부하가 걸리는 경우 이 주석을 제거하세요.
    var cnt = 0;
    for (var i=0; i<f.stx.value.length; i++)
    {
        if (f.stx.value.charAt(i) == ' ')
            cnt++;
    }

    if (cnt > 1)
    {
        alert("빠른 검색을 위하여 검색어에 공백은 한개만 입력할 수 있습니다.");
        f.stx.select();
        f.stx.focus();
        return;
    }
    */

    f.action = "<?=$g4['bbs_path']?>/search.php";
    f.submit();
}
</script>
<!-- 검색 끝 -->