member.php > Change <title></title> tag.

Hi!
i want to change <title></title> in member.php

i see the template in Style Editor called MEMBERINFO
this is ok. standart <title> is:

<title>{vb:rawphrase view_profile}: {vb:raw prepared.username} - {vb:raw vboptions.bbtitle}</title>


but i want to change like this:
<title>customfield1 customfield2 customfield1</title>


custumfield means, the profile fields that i created for the users to fill while register my site. this fields are must fields so the user can`t bypass it.

and i want to see in the title this fields. how can i do it ?