Returning Player - Reinstall

[Green Legend Ran]

So, it's been almost 6 years since I played p99 and the itch has returned. Waiting on my new laptop to arrive along with the external cd drive so I can reinstall the game using my old discs. I remember having to use the key code the first time I played p99 (from the physical discs I have). Will this be a problem for me during the reinstall: can I use the same key or do I need to acquire a new key?