If I understand correctly, you can knock it down to 2 files (one if you want to)
file 1 - The HTML form
file 2 - A php page that validates the info submitted and prints it out on the web page.
In the action field of the HTML form, put the file name of the PHP file that will validate the data.
The second file (the php file) can be just like a normal page with blurbs of code to validate the info, print it out, and email it. Just put the code where you would like the info to be displayed.
<?
//validate the info
//If something is wrong
if(empty(name) or whatever other validation...){
print("ERROR - blah blah field is required...yadda yadda");
//If everything checks out
}else{
print("The following information has been submitted.<br>");
print("Name: $name<br>");
print("Project: $project<br>");
//mail the info
mail("ddb@davidbethel.com", $name, $project, "From: $address\n");
}
?>