That would be just as Dave said. Use the "Email" payment provider for the check option and your chosen payment processor for the credit card option. You can change the displayed name of each choice as you see fit.
Peter
Professional ecommerce web hosting services Shared hosting Windows & Linux | Dedicated servers | Domains | SSL Ecommerce Templates specialists since 2003 https://servelink.com
OK, thanks, I was able to change "Email" to "Check by Mail" and that shows up, but on the store order form that gets emailed to the store owner, it doesn't say "Check by Mail" anywhere on the order form. How can I have the order form (and receipt) say what method was used for the order (check or credit card).
If you go to the payment provider admin page and click on modify for whichever payment method you wish to add the email info, then click on the Email Headers / Footers button and you can add information that will show only for that particular payment method.