Go to Setup / Administration Setup / Communication Templates / Email Templates    and look in the folder HOC Email Templates.

You should see an email template that matches each of the ones found in the zipped archive.

Select your first email template and click on EDIT.  

Note that some of the emails are of template type HTML and some are of template type Text.  

Updating the HTML templates takes an extra step compared with editing one that is in text only.

Update the email description if your new version has an improved description.  (Feel free to update it further if you want to use your own language to make it clearer to you what the email template does).

SAVE the change.  

NOTE: We do not recommend renaming the email template names.  It may create problems with the email alerts and workflows that use them, requiring further updating on your part.

MOST of the emails will be of type html - which means you'll have to edit both the HTML version and the Text Version, as we'll demonstrate here.

If its a 'text only" template -- you'll only have to update the 'text version"

OR:  If you have customized your emails and want to retain some of your prior customization -- just edit the sections that need to be updated.  Pay particular attention to the corrected merge fields.

FIRST: Update the Subject Line   (this isn't necessary if the subject line hasn't changed)

SECOND: Update the Content of the email.  Select ALL of the content and set the font to Arial and the size to 9 point.  (This is the default -- if you want bigger text in all your emails you can choose to do so).

OPTIONAL:  Click the PREVIEW button to see what the email will look like (font sizes, etc).  The preview will still be showing you the merge fields however, this just shows you how it will look generally.

If you are satisfied with the look of the email:

Then click SAVE

Note:  If you are pasting selected text into an existing email template, you MAY find that your pasted text has a different font size than the rest of the content.

To correct this -- after you are through editing, select ALL of the email's content, and use the Font and Size picklists in the Formatting Controls and set everything to Arial 9 point.

Click on "Edit Text Version"

You already have the text version conveniently on your clipboard. So just paste it in!  

Click Save.

You'll get a warning the all existing text will be overwritten.  

In many cases, you'll find that some additional spaces are placed between lines.  Quickly remove the extra spaces so that the text version looks good. (Not waste much time on this though, most people view email as html so few will ever see the text versions.)

Click SAVE.

If you want to test the email template further, you can then choose to Send a Test and Verify Merge Fields.