iphone - launching an app and loading a file

I have built my own URL scheme for my App.

As far as I understand, now I can have a link on a email, in the form

myApp://....

and my app will launch.

But what I need is this:

1. my app creates its own kind of files. It is a zip file renamed as AnyName.myApp
2. I need this app to allow the user to mail this file to another person that uses my App.
3. This person must be able to tap on the attachment and open开发者_JAVA技巧 the attachment with my app.

How do I do that?

Can you guys point me in the right direction or give me some code to start?

thanks.

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See the iOS 4 Programming Guide for details.