Create/Delete File for Product?

[Bilderback]

Hi, I am beginning to dive into the Product creation and was trying to find the simplest way
to manage a Product for the admin through the Install/Uninstall process.
The normal process with a Product which includes files is to upload via FTP and import product.xml
Is it possible to completely avoid file uploads and simply write PHP to create & delete files
or will I run into folder permission problems and/or errors?
Or is this possible through .xml or even a practical approach?
I see some forum owners uninstall Products and such and forget to remove relevant files.

Example:
Import product.xml which creates any needed files (product.php,bitfields.xml,cpnav.xml,etc)
And at Uninstall, all these create files would be deleted.

Just curious - thanks