[Eq4bits]

looking at the source code on the link you gave you need to change the percentages in each case (everytime it appears in the FORUMHOME template:

<thead>              <tr align="center">
                <td class="thead">&nbsp;</td>
                <td class="thead" width="100%" align="$stylevar[left]">$vbphrase[forum]</td>
                <td class="thead" width="175">$vbphrase[last_post]</td>
                <td class="thead">$vbphrase[threads]</td>
                <td class="thead">$vbphrase[posts]</td>
                <if condition="$vboptions['showmoderatorcolumn']">
                <td class="thead">$vbphrase[moderator]</td>
                </if>
              </tr>
  </thead>

for example:

  <thead>
              <tr align="center">
                <td class="thead" width="5%">&nbsp;</td>
                <td class="thead" width="80%" align="$stylevar[left]">$vbphrase[forum]</td>
                <td class="thead" width="5%">$vbphrase[last_post]</td>
                <td class="thead" width="5%">$vbphrase[threads]</td>
                <td class="thead" width="5%">$vbphrase[posts]</td>
                <if condition="$vboptions['showmoderatorcolumn']">
                <td class="thead">$vbphrase[moderator]</td>
                </if>
              </tr>
  </thead>

by adjusting ALL percentages to total 100% (5%+80%+5%+5%+5%=100%) OR use px width's that total the width of your forum/table (25px+500px+175px+50px+50px=800px) instead of percentages... using the SAME percentages/px's in the section of code for ALL of the tabs (if you have 4 tabs then the code is in FORUMHOME four times. percentages and pixels used for 'example' only).