[Lynne]

To put it with the rest of the stuff (joindate, location, age):

                <dl class="userinfo_extra"> 
                    <vb:if condition="$post['joindate']"><dt>{vb:rawphrase join_date}</dt> <dd>{vb:raw post.joindate}</dd></vb:if> 
                    <vb:if condition="$post['field2']"><dt>{vb:rawphrase location_perm}</dt> <dd>{vb:raw post.field2}</dd></vb:if> 
                    <vb:if condition="$post['age']"><dt>{vb:rawphrase age}</dt> <dd>{vb:raw post.age}</dd></vb:if> 
                    <vb:if condition="$post['field1']"><dt>{vb:rawphrase field1_title}</dt> <dd>{vb:raw post.field1}</dd></vb:if> 
                    <vb:if condition="$post['field3']"><dt>{vb:rawphrase field3_title}</dt> <dd>{vb:raw post.field3}</dd></vb:if> 
                    <vb:if condition="$post['field4']"><dt>{vb:rawphrase field4_title}</dt> <dd>{vb:raw post.field4}</dd></vb:if> 
                    <dt>{vb:rawphrase 'posts'}</dt> <dd>{vb:raw post.posts}</dd>     
                    {vb:raw template_hook.postbit_userinfo_right_after_posts} 
                </dl> 

Not Tested. (Personally, I'd use the template_hook, but this is probably easier for you if you don't know how to use them.)