Edit these templates (in style manager) with the following changes:

provb_index_latest_memberbit

Change both (2) instances of $latest_members_count%3 to $latest_members_count%2

provb_index

Above $provb_index_latest_members change the td class="tcat" colspan="3" to td class="tcat" colspan="2"

Go to Vboptions->Provb index:

Change the number of members to show in 2's. Like 4 or 8 or 10, etc.

Note: You can do the same for latest attachments if you want it to be the same. Just need to edit the right templates for the attachments instead of members (its called provb_index_attachbit

Then, copy your new members/attachments table it will look like this:

PHP Code:
<if condition="$provb_index_latest_members">
            <
table cellpadding="$stylevar[cellpadding]cellspacing="$stylevar[cellspacing]width="100%" border="0" class="tborder">
                <
tr>
                    <
td class="tcat" colspan="2">Ten Random Members</td>
                </
tr>
                
$provb_index_latest_members
            
</table>
            </if> 
Place it under $provb_index_area_3 or where ever else you'd like it to display.

The same can be done for attachments - here is the table for that:

PHP Code:
    <if condition="$provb_index_attachments">
            <
table cellpadding="$stylevar[cellpadding]cellspacing="$stylevar[cellspacing]width="100%" border="0" class="tborder">
                <
tr>
                    <
td class="tcat" colspan="2">$vbphrase[provb_index_newattachments]</td>
                </
tr>
                
$provb_index_attachments
            
</table>
            </if> 
Just remember to style it and and edit the titles how you'd like.