Magento core/email_template_mailer not send mail for a custom module

Question 1

After a long fight with code , i have got it solution.Main, issue was the code format and it variable system format.

Here the code And steps:

Step1:Get current store id.

 $storeId=Mage::app()->getStore()->getId();

Step2: Sender() parameters should be in array format array('email'=>(string) $senderemail,'name'=> (string)'$sendername); ....

Full code is

 $storeId=Mage::app()->getStore()->getId();
$Vendor=Mage::getModel('vendor/vendor')->load(57);

    /** @var $mailer Mage_Core_Model_Email_Template_Mailer */
            $mailer = Mage::getModel('core/email_template_mailer');
            $emailInfo = Mage::getModel('core/email_info');
            $emailInfo->addTo((string)$Vendor->getEmail(),(string) $Vendor->getName());
            $mailer->addEmailInfo($emailInfo);
         // Set all required params and send emails
            $mailer->setSender(array('email'=>(string) 'dev.amitbera@gmail.com','name'=> (string)'Bal ta'));
            $mailer->setStoreId($storeId);
            $mailer->setTemplateId((string) 'vendor_account_create_template');
            $mailer->setTemplateParams(array('vendor'=>$Vendor));
            $mailer->send();

Question 2

use this..

for config.xml

<template>
            <email>
                <custom_payment  module="paymentlink">
                    <label>Payment Link</label>
                    <file>custom_payment.html</file>  <!-- this specifies the path where the custom template is located -->
                    <type>html</type>
                </custom_payment>
            </email>
        </template>

for controller

try{
 //load the custom template to the email  
    $emailTemplate = Mage::getModel('core/email_template')->loadDefault('custom_payment');
 // it depends on the template variables
    $emailTemplateVariables = array();
    $emailTemplateVariables['order_id'] = $data['order'];
    $emailTemplateVariables['logo_url'] = $logo;
    $emailTemplateVariables['customer_name'] = $firstname;
    $emailTemplateVariables['customer_info'] = $firstname.' '.$lastname;
    $emailTemplateVariables['shipment_url'] = $data['link'];
    $emailTemplateVariables['store_name'] = Mage::app()->getStore()->getName();

    $emailTemplate->setSenderName($senderName);
    $emailTemplate->setSenderEmail($senderEmail);
    $emailTemplate->setType('html');
    $emailTemplate->setTemplateSubject($firstname.' you forgot to choose shipping options for your product');
    $emailTemplate->send($data['email'], $firstname . $lastname, $emailTemplateVariables);
    $linker = mysql_real_escape_string(base64_encode($data['link'])); //print_r($linker);exit;
    $model = Mage::getModel('paymentlink/paymentlink')
    ->setRelatedOrderid($data['order'])
    ->setCustEmail($data['email'])
    ->setPrice($data['price'])
    ->setReceived(0)
    ->setLink($linker)
    ->setLinkId($data['key'])
    ->save();
Mage::getSingleton('adminhtml/session')->addSuccess("Link has been Generated successfully & Email has been sent ! </br>".$data['link']."");
    }
    catch (Exception $e) {
        $errorMessage = $e->getMessage();
        Mage::getSingleton('adminhtml/session')->addError("We cannot send generated link . There must be some error occurs.");
        return $errorMessage;
    }