Currently the subject of the email I get is "Contact Form" which is the page name.

I can see in SubmittedFormEmail.ss <h1>$Subject</h1> which I can change for the body of the email but what about the actual subject of the email? it would be good if I could change this in the CMS, can this be done?

You need to change the php-code. There is no way to change the email´s title in the cms.

If you use the recently released 0.2 version of user forms then you can customize the subject heading in the cms.

I'm running v2.3.1 though :-( and cannot upgrade.

How can I hard code this?

In UserDefinedForm.php you have the following lines:

if( $this->EmailOnSubmit ) {
			$email = new UserDefinedForm_SubmittedFormEmail($submittedFields);			
			$email->populateTemplate($emailData);
			$email->setTo( $this->EmailTo );
			$email->setSubject( $this->Title );

Change

$this->Title

to the string you want to have as subject of the email. Do the same some lines below for the $emailToSubmiter object. That´s it.

I have already figured that out, but I'd really like this to be set in the CMS for each userform. It's no good setting the subject to lets say "Contact Form Submission" when I have another form which is not a contact form.

Then you should upgrade or implement that function by youself.

For those that do not know v0.2 of user forms will let you dynamically set the subject, from address, to address all from the CMS.

However User Forms v.0.2 requires SS 2.3.2 beta, which has not yet been released as a stable version. It will NOT work with the current release (v.2.3.1).