Answer 1

When you deactivate a feature, items and documents are not removed automatically.  You will need to add a feature receiver to your project and add code to delete the file when the feature is deactivated.  To create a feature receiver, follow the steps in this blog post:   http://blog.tylerholmes.com/2008/03/walkthrough-creating-sharepoint-feature.html

Afterwards, add code to the OnFeatureDeactivated method to remove the file.  You can use the GetFile method of the SPWeb class to get an instance of the SPFile class representing the page  you want to delete.  Finally, call the Delete method on the SPFile class.

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Bryan Phillips
MCT, MCSD, MCDBA, MCSE
Microsoft MVP - sharepoint  Services
Blog: http://bphillips76.spaces.live.com
Web Site: http://www.composablesystems.net

Answer 2

Thanks a lot Bryan!

It works.