Editing the "Check Out" Page

Once the "checkout" button is clicked in the cart, it brings one to a log in / payment page.
(See attached Screen Shot)

Simple question: Under Welcome, Please sign in:

I would like to change the wording FROM "New Customers" to "Guest Checkout".

Which file and under which folder would I edit to affect that change? I've searched around and saw that verbiage in under a language folder in a login.php file, but the edit wouldn't take. Is it something that must be done through my admin panel?

Hoping to locate the correct file to make that simple text edit.
Thanks!

DavidWM:

Once the "checkout" button is clicked in the cart, it brings one to a log in / payment page.
(See attached Screen Shot)

Simple question: Under Welcome, Please sign in:

I would like to change the wording FROM "New Customers" to "Guest Checkout".

Which file and under which folder would I edit to affect that change? I've searched around and saw that verbiage in under a language folder in a login.php file, but the edit wouldn't take. Is it something that must be done through my admin panel?

Hoping to locate the correct file to make that simple text edit.
Thanks!

Could be a number of reasons thatit didn't "take", but yes it is in the login.php that is loaded when your template is active, so the file is located/should be located at: includes/languages/YOUR_LANGUAGE/YOUR_TEMPLATE/login.php and specifically:

define('HEADING_NEW_CUSTOMER_SPLIT', 'New Customers'); 

The file could basically have just the define you want to modify in it and everything else will be taken from the default file.

Clear your cache.
Try a different browser. Hmm what else...

Well, it took that time. Clearing the cache was the trick I believe.
Many thanks!
Dave