To comment out the lines you can select these areas of code and on the left in DW you should have a comment control that you can use to apply the comment. With the code selected click on the comment icon and choose to apply the php style comments. You will need to do this for the form as well as the spry validations that are on the page after the form.
I'm including an updated version of the checkout page with these changes applied for you. As for the email message do you mean to say that you cannot get the email at the admin address regardless or only when you use the email address as the cc in the globals file to get a copy of the receipt. If your admin email address does not get the regular receipt then they will probably not get the copy of the receipt. As a test make sure that you have a registered user with the admin email address then run a test transaction. Please post back with as much detail as you can.
First of all, Eric, thanks for the file, it worked beautifully. The only thing that remains on the issue of how Paypal Standard works is on the Order Sucess! page. The order goes through great, we still do not have an email which goes to the site owner informing them that an order has been placed...however, they do get one automatically from Paypal, so we aren't so concerned about that. I am including a screen shot of the order success page as it comes up for the customer after placing the order. You will see two empty boxes which are labeled "Paypal Express Checkout Infor" and "Billing Info" respectively. I'm assuming they come up blank because we are using Paypal Standard. Can we get those taken out? I'm including the zipped page file. Thanks!