Afaik the gog key can lead to some issues on most servers. I think there is a thread on gog about it as well. In general buying a new online copy might be a good idea, but if I were you, I'd invest in a portable DVD drive - this way you could also install other old games you might have around and want to give a try. I enjoy to install some of the very old games from time to time, and buying them again just for a couple of hours is not an option for me.