[TYPO3] How to overwrite HMENU?

[Bing Du]

Hi,

We're using typo3 3.8.1.

The page tree is like

page1
    page2
      page31
      page32

I want page2 to use the same template that page1 uses but just has its 
own nagivation menu that only shows page31 and page32.

The HMENU of page1 is like the following in the main template.

==========
temp.nav = COA
temp.nav.stdWrap.dataWrap = <div id="nav">|</div>
temp.nav.10 = HMENU
temp.nav.10 {
     wrap = <div id="navheader"></div><ul id="start">|</ul><div 
id="navfooter"></div>
     1 = TMENU
     1 {
          NO = 1
          NO.allWrap = <li>|</li>

          ACT = 1
          ACT {
               allWrap = <li>|</li>
               ATagParams = class="selected nocursor"
          }


      }
      2 < .1

}
============

The following is the extension template I created for page2 in the hope 
to erase temp.nav and reconstruct it to show the menu starting from 
page2.  But the menu on page2 is still the same as that on page1.

============
temp.nav >  # get rid of the original content of temp.nav

temp.nav = COA
temp.nav.stdWrap.dataWrap = <div id="nav">|</div>
temp.nav.10 = HMENU

temp.nav.10.special = list
temp.nav.10.special.value = 3117  # 3117 is page2's id.

temp.nav.10 {
     wrap = <div id="navheader"></div><ul id="start">|</ul><div 
id="navfooter"></div>
     1 = TMENU
     1 {
          NO = 1
          NO.allWrap = <li>|</li>

          ACT = 1
          ACT {
               allWrap = <li>|</li>
               ATagParams = class="selected nocursor"
          }


      }
      2 < .1

}
============

Did I miss anything?  I'd appreciate any help.

Thanks,

Bing