[Xenon]

which required fields do you mean?
the standart one, or custom fields?

if you mean the standart like emails or such open members.php
find:

PHP Code:

$DB_site->query("UPDATE user SET birthday='".addslashes($birthday)."',signature='".addslashes($signature)."',customtitle='".intval($customtitle)."',usertitle='".addslashes($customtext)."',email='".addslashes(htmlspecialchars($email))."',parentemail='".addslashes(htmlspecialchars($parentemail))."',coppauser='$coppauser',homepage='".addslashes(htmlspecialchars($homepage))."',icq='".addslashes(htmlspecialchars($icq))."',aim='".addslashes(htmlspecialchars($aim))."',yahoo='".addslashes(htmlspecialchars($yahoo))."',usergroupid='$bbuserinfo[usergroupid]' WHERE userid='$bbuserinfo[userid]'"); 


and delete out the variables which shouldn't change

for custom fields find that code in members.php (update user section):

PHP Code:

$profilefields=$DB_site->query("SELECT profilefieldid,required,title,size,maxlength
                                  FROM profilefield
                                  WHERE editable = 1"); 


and replace it with:

PHP Code:

$profilefields=$DB_site->query("SELECT profilefieldid,required,title,size,maxlength
                                  FROM profilefield
                                  WHERE editable = 1 AND required = 0"); 


i think this should do it.