Digital D/LFollow

I have no idea what you're talking about. Do you mean downloading the game instead of installing from CD? I wasn't aware that was available as an option. However, at some point, you would need to have a registration key whether you bought a CD or not (to show you own the game). I would assume with a download-only install, you'd just use the same key to download it again (if that's even needed).

I guess a little more clarification would help. What exactly are you doing, and what exactly are you concerned about?