Since the advice for prepping for 'ZuZoo includes bringing a full size spare along, has anybody tried adapting the current tailgate inset for the cheapo temp spare over to be able to transport a full size one?

I have a '99 so have 16" wheels. I thought transporting the spare in the tailgate might work if a suitable method for securing the wheel could be devised. I know I will probably have to ditch the plastic cover but it seems criminal to me to have that space and suffer with the lack of visibiity it causes and not be able to use it for what it was originally designed for.