Drop-down text field

I’d like to change the Subject text box to a drop-down text box.

The way that the text boxes are hard-coded into the script makes it tricky and I broke the script on my first attempt (the dreaded white screen).

I want to replace type=”text” with something like this:

<select name=”cars”>
<option value=”volvo”>Volvo</option>
<option value=”saab”>Saab</option>
<option value=”fiat” selected>Fiat</option>
<option value=”audi”>Audi</option>
</select>

Of course, I would also remove the “Subject of email” placeholder.

Has this been done with this script?

https://www.ads-software.com/extend/plugins/contact-coldform/