Create a Website that Generates & Shares ICS files

I wish to make a site similar to this one [login to view URL] I want this done on a brand new CakePHP instance. (i require this to be installed an setup aswell) To create ICS files for download or sharing.. (have attached a really basic wireframe) The user should be able to customise all fields and then the ics(or other event) file will be saved on a server for sharing via a url or download. The user will also be able to upload a ics file to edit it and then generate a new one from this alterations. There is a post on [login to view URL] with the classes and some instructions i would require the form to be styled much nicer than the example given, In your bid, please explain how you would go about completing this project and give me examples of what you think the form would look like..