Can I add a CE-key to an account with a regular factions key?

Is it possible to add a CE-key to a GW account with a regular factions key already installed? My CE order had not yet arrived when ANET decided to cut off factions access. I went ahead and added a regular factions retail key to maintain access to the new content. However, I just received an e-mail stating that my CE copy will be delivered in a few days. Will the CE-key be usable with my account now that it also has a regular key?

Yes, but it'll be a huge waste of money. You'll have all the CE goodies, but your SE-key will basically be wasted.

Thanks for the quick reply. Looks like my wallet got p0wned by ANET