Get license key from Coldfusion 8 Instance

Easy enough, I know, but the problem is that someone uninstalled the server without retrieving the license key; therefore we can't simply navigate to the administrator page(s) to retrieve it.

Any ideas?

I'm not familiar with how Coldfusion licenses work but can we simply re-install the Coldfusion 10 trial version and it will recognize that we did once have a key and allow it to run as a standard, non-developer, edition?

Also, after retrieving the key, we need to move the key to another server as this one is being de-commission (reason it was originally uninstalled). How can we go about doing this?

Thanks in advance to any help we can get for this!!