Change the Email Tempaltes of the site.

Hello Support,

I want to change the email tempaltes of easy social component. Like if i am register from ES componnet then i'll get a activation mail. So i want to change the Activation email templates.
I want to chnage all the emial tempaltes with my custom CSS and HTML. How i do this.
In admin area there is not any option to change the email templates. I have found a folder in Wirefram theme that is "emails" in the folder there all the templates. so i'll do it manually or any option in admin.

Please let me know ASAP. I am waiting your response.

Thanks