Make a copy of config.xml from app > code > core > Mage > Customer > etc > config.xml and add the following line of code into the customer account fieldset and save it to app > code >local>config.xml and in this file add the following line of code into the customer account fieldset:
<fieldsets>
<group_id><create>1</create><update>1</update></group_id>
</customer_account> </fieldsets>
add code to the frontend of the store, in the registration form. Open template/customer/form/register.phtml and add the following code somewhere in the form:
<div class="input-box">
<label for="group_id"><?php echo $this->__('Group') ?><span class="required">*</span></label><br/>
<select name="group_id" id="group_id" title="<?php echo $this->__('Group') ?>" class="validate-group required-entry input-text" />
<?php $groups = Mage::helper('customer')->getGroups()->toOptionArray(); ?>
<?php foreach($groups as $group){ ?>
<option value="<?php print $group['value'] ?>"><?php print $group['label'] ?></option>
<?php } ?>
</select>
</div>
also change some code in app\code\core\Mage\Customer\controllers\AccountController.php now
replace $customer->getGroupId();
with
if($this->getRequest()->getPost(‘group_id’))
{ $customer->setGroupId($this->getRequest()->getPost(‘group_id’));
} else {
$customer->getGroupId(); }
hello
Gregoryciny