[Chris M]

Run this query:
[sql]ALTER TABLE usergroup ADD userchoose smallint(6) NOT NULL DEFAULT '0'[/sql]
Open admin/usergroup.php:
Find:

PHP Code:

  makeyesnocode("Viewable on <a href=\"../showgroups.php?s=$session[sessionhash]\" target=\"_blank\">Show Groups</a>?","showgroup",1); 


Add below:

PHP Code:

  makeyesnocode("User can select to join this group on registration?","userchoose",0); 


Find:

PHP Code:

usergroup (usergroupid,title,usertitle, 


Replace with:

PHP Code:

usergroup (usergroupid,title,usertitle,userchoose, 


Find:

PHP Code:

NULL,'".addslashes($title)."','".addslashes($usertitle)."', 


Replace with:

PHP Code:

NULL,'".addslashes($title)."','".addslashes($usertitle)."','$userchoose', 


Find:

PHP Code:

  if (($usergroupid != 1 and $usergroupid != 2 and $usergroupid != 3 and $usergroupid != 4 and $usergroupid != 7) or $usergroup['showgroup'] == 1) {
      makeyesnocode("Viewable on <a href=\"../showgroups.php?s=$session[sessionhash]\" target=\"_blank\">Show Groups</a>?","showgroup",$usergroup[showgroup]);
  } else {
        makehiddencode("showgroup",0);
    } 


Add below:

PHP Code:

  makeyesnocode("User can select to join this group on registration?","userchoose",$usergroup[userchoose]); 


Find:

PHP Code:

usergroup SET title='".addslashes($title)."',usertitle='".addslashes($usertitle)."', 


Replace with:

PHP Code:

usergroup SET title='".addslashes($title)."',usertitle='".addslashes($usertitle)."',userchoose='$userchoose', 


Open root/register.php:
Find:

PHP Code:

    // User selectable style sets
    $stylesetlist = "";
    if ($allowchangestyles==1) {
        $stylesets=$DB_site->query("SELECT * FROM style WHERE userselect=1");
        while($thisset=$DB_site->fetch_array($stylesets)) {
            if ($bbuserinfo[styleid]==$thisset[styleid]) {
                $selected = "selected";
            } else {
                $selected = "";
            }
            $thisid = $thisset[styleid];
            $thisstylename = $thisset[title];

            eval ("\$stylesetlist .= \"".gettemplate("modifyoptions_styleset")."\";");
            altbgcolor($prf_bgcolor);
            eval ("\$stylecell = \"".gettemplate("register_stylecell")."\";");
        }
    } else {
        $stylecell = "";
    } 


Add below:

PHP Code:

    // User selectable usergroups
    $usergrouplist = "";
        $usergroups=$DB_site->query("SELECT * FROM usergroup WHERE userchoose=1");
        while($thisgroup=$DB_site->fetch_array($usergroups)) {

            $thisisid = $thisgroup[usergroupid];
            $thisisgroupname = $thisgroup[title];

            eval ("\$usergrouplist .= \"".gettemplate("modifyoptions_usergroup")."\";");
            altbgcolor($prf_bgcolor);
            eval ("\$groupcell = \"".gettemplate("register_groupcell")."\";");
        } 


Find:

PHP Code:

  if ($allowchangestyles==1) {
    $newstylefield = "styleid,";
    $newstyleval = "'".intval($newstyleset)."',";
  } else {
    $newstylefield = "";
    $newstyleval = "";
  } 


Add below:

PHP Code:

    $newgroupid = "'".intval($newusergroup)."',"; 


Find:

PHP Code:

'$newusergroupid', 


Replace with:

PHP Code:

'$newgroupid', 


Create new template: register_groupcell

<tr>
	<td bgcolor="{ firstaltcolor }"><normalfont><b>Usergroup:</b><br>
	<smallfont>You make pick a usergroup from the list to belong to.</smallfont></normalfont></td>
	<td bgcolor="{ firstaltcolor }"><smallfont><select name="newusergroup">
	$usergrouplist
	</select></smallfont></td>

[high]Remember:[/high] Remove the spaces in [high]{ firstaltcolor }[/high]
Create new template: modifyoptions_usergroup

<option value="$thisisid" $selected> $thisisgroupname </option>

Edit template: registeradult (and registercoppa)
Find:

$stylecell

Replace with:

$stylecell
$groupcell

All should work

Satan