php is easiest using the mail() function. You can format the email message however you like.

Remove padding from .internal_content and add padding-left:10px to .sub_header

Try using floats to position your divs.

You .bgtablealign might be the issue, try:

background-image: url('c:/Users/xxx/Documents/WebStuff/stripe_384854a7dd3238d4a9aa8145342c5e36.png');

Right now you are using a mailto tag as the action for your form. If you want to use php, you need to have a php file as the action and use that php file to handle the information.