N95 8GB from voadafone- is it possible to change the product code and keep spiderman?

Afraid not my friend.

Upgrading firmware with the same Proct Code however yes, providing you backup all files.

I recently changed a product code of an N95 8GB with Spiderman installed, just so I could install new Language packs, which, even though I did a back up, I was unable to restore the settings due to the language change.

The same applies if you change your product code for what ever reason from your original product code and ungrade. You WILL Lose Spiderman 3.

You can however, download a DVD of Spiderman 3 from the web, and then install DivX, and install the film in MP4, and allocate it in the videos folder. That way you will still have the film at least.

Hope that helps.

Micky