www.wysiwygwebbuilder.com

Please is there a way I can reduce the signup editbox
I want just the username, password and email

You can customize the form (and script) by converting the signup object to a standard form using 'Convert to form'.

I ready did that.
What I mean is, if I remove the fullname editbox do I need to modify any line of code in the generated html code

Yes, you will also need to customize the script. So, some programming knowledge is required.

I experimented by deleting the Full Name Editbox and from the .php code. It worked perfectly for me. If you need any help you can ask.