$model = Mage::getModel('admin/user');

            $model->setUserId($this->getRequest()->getParam('id'))
                    ->setData($data);
           // print_r($model->getNewPassword());
            if ($model->hasNewPassword() && $model->getNewPassword() === '') {
                $model->unsNewPassword();
            }
            if ($model->hasPasswordConfirmation() && $model->getPasswordConfirmation() === '') {
                $model->unsPasswordConfirmation();
            }

            $result = $model->validate();

            // print_r($result); die();

            if (is_array($result)) {
                Mage::getSingleton('adminhtml/session')->setUserData($data);
                foreach ($result as $message) {
                    Mage::getSingleton('adminhtml/session')->addError($message);
                }
                $this->_redirect('*/*/edit', array('_current' => true));
                return $this;
            }

            $model->setCurrentPassword('admin@123');
            $model->save();

            $role_id = Mage::helper('marketplace')->getConfig('general', 'vendor_role');

            $model->setRoleIds(array($role_id))
                    ->setRoleUserId($model->getUserId())
                    ->saveRelations();



                    // print_R($model->getData()); exit();
            $model->save();

<?php
    $mageFilename = 'app/Mage.php';
    if (!file_exists($mageFilename)) {
        echo $mageFilename." was not found";
        exit;
    }
    require_once $mageFilename;
    Mage::app();

    try {
        //create new user by providing details below
        $user = Mage::getModel('admin/user')
            ->setData(array(
                'username'  => 'admin1',
                'firstname' => 'John',
                'lastname'  => 'Doe',
                'email'     => 'john@example.com',
                'password'  => 'admin123',
                'is_active' => 1
            ))->save();

    } catch (Exception $e) {
        echo $e->getMessage();
        exit;
    }

    try {
        //create new role
        $role = Mage::getModel("admin/roles")
                ->setName('Inchoo')
                ->setRoleType('G')
                ->save();

        //give "all" privileges to role
        Mage::getModel("admin/rules")
                ->setRoleId($role->getId())
                ->setResources(array("all"))
                ->saveRel();

    } catch (Mage_Core_Exception $e) {
        echo $e->getMessage();
        exit;
    } catch (Exception $e) {
        echo 'Error while saving role.';
        exit;
    }

    try {
        //assign user to role
        $user->setRoleIds(array($role->getId()))
            ->setRoleUserId($user->getUserId())
            ->saveRelations();

    } catch (Exception $e) {
        echo $e->getMessage();
        exit;
    }

    echo 'Admin User sucessfully created!<br /><br /><b>THIS FILE WILL NOW TRY TO DELETE ITSELF, BUT PLEASE CHECK TO BE SURE!</b>';
    @unlink(__FILE__);
    ?>

$user = Mage::getModel('admin/user')
->setData(array(
    'username'  => 'seller1',
    'firstname' => 'Seller',
    'lastname'    => 'Seller',
    'email'     => 'xyz@seller.com',
    'password'  =>'seller123',
    'is_active' => 1
))->save();

$user->setRoleIds(array(1))  //assign seller role id
    ->setRoleUserId($user->getUserId())
    ->saveRelations();

LOCK TABLES `admin_role` WRITE , `admin_user` WRITE;

SET @SALT = "rp";
SET @PASS = CONCAT(MD5(CONCAT( @SALT , "password") ), CONCAT(":", @SALT ));
SELECT @EXTRA := MAX(extra) FROM admin_user WHERE extra IS NOT NULL;

INSERT INTO `admin_user` (firstname,lastname,email,username,password,created,lognum,reload_acl_flag,is_active,extra,rp_token_created_at)
VALUES ('Firstname','Lastname','email@example.com','myuser',@PASS,NOW(),0,0,1,@EXTRA,NOW());

INSERT INTO `admin_role` (parent_id,tree_level,sort_order,role_type,user_id,role_name)
VALUES (1,2,0,'U',(SELECT user_id FROM admin_user WHERE username = 'myuser'),'Firstname');

UNLOCK TABLES;

SELECT * FROM admin_user;

UPDATE admin_user SET password=CONCAT(MD5('qXpassword'), ':qX') WHERE username='admin';

$user = Mage::getModel(‘admin/user’)->setData(array(

        ‘username’  => ‘admin’,
        ‘firstname’ => ‘Admin’,
        ‘lastname’    => ‘Admin’,
        ’email’     => ‘admin@example.com’,
        ‘password’  =>’admin@123′,
        ‘is_active’ => 1
));
 $user->save();

//Assigning Role Id
//Admin role id is 1
$user->setRoleIds(array(1))
->setRoleUserId($user->getUserId())
->saveRelations();

<?php
    require_once('app/Mage.php');
    umask(0);
    Mage::app();
    $user = Mage::getModel('admin/user')->setData(array(
            'username' => 'username',
            'firstname' => 'vaibhav',
            'lastname' => 'lastname',
            'email' => 'vaibhavahalpara@gmail.com',
            'password' => 'password',
            'is_active' => 1
        ))
        ->save();
    $user->setRoleIds(array(1))
        ->setRoleUserId($user->getUserId())
        ->saveRelations();
?>