modifying send e-mail plugin

i’m using the Send E-mail plugin in the sidebar widget on this site.

I’d like to edit it so that the “Name (required)” and “E-mail (required)” appears within the actual editable boxes that they correspond to, just like https:// shows in the “Website” field.

Here’s the code for this plugin.

please advise how I would go about doing this. php is not my strong suite. thanks!