I was looking into remastering ubuntu and this one seems promising so will it work?
The question needs to be reversed: does Ubuntu Builder support Ubuntu 14.10
And the answer is probably no since Ubuntu Builder was discontinued around 2014-02-12 or it might be yes, with limited support. ubuntu builder alternative or replacement suggests Ubuntu Customization Kit
Might I offer a solution that will always work? Use the manual method and forget about tools like Ubuntu Builder. It will teach you a lot about the inner workings of an operating system and it will also make it possible for you to investigate alterations you want to make where a tool like Ubuntu Builder will restrict you to what the tool can offer.
I have written an example based of Ubuntu Server: How to create a Customized Ubuntu Server ISO? That will allow you to pick your own desktop or desktops if you want more than 1. Or make your own server based install. Imagine a live dvd with apache, mysql, php pre-installed but also that website you made all ready to go from the Live DVD with a shortcut on the desktop to that website and/or pre-made documents about that website.
And we also have How to customize the Ubuntu Live CD? that is about editing an Ubuntu with already a desktop in the Live DVD.