is there a way I can make the first name and last name boxes wider if I don't need the middle etc ?

Inject the following CSS code to make them wider: http://www.jotform.com/help/117-How-to-Inject-Custom-CSS-Codes 

#first_3{

    width: 130px;

}

#last_3{

    width: 147px;

}

Let us know if you need more help.

Many thanks. I've got the idea now, and have been able to use it elsewhere
You guys are really helpful !
Robert
...

You are welcome! Open a new thread if you need anything else. :-)