Customise Email templates for Zendesk

I require someone to customise the email template section in Zendesk. From what i can see you only need to know basic HTML to complete this task. I have an example of another email template that i like. The requirement will just be to centre everything, add a logo, add a border and a few other small tweaks. I would not expect this would take someone with HTML experience more than 10-20 minutes.