Step 3 : Download the sitemap ,which save as a xml file .
Step 4 : You can create a separate page for the sitemap in your site and Log in to google webmaster account and include the sitemap there.
Step 5 : If you are new to google webmaster ,you can click here to see the complete tutorial about google webmaster account for the website.
Step 6 : After logging in ,click on the index tab at the right side of google webmaster.