Hmm... I don't think I was ever asked for a CD key either.

I don't know if it's ok to ask for this here, but I'll help you if you can prove you own it.

Take a picture of you, standing by your CD case and the Rome:TW CDs, along with a paper. On the paper should be writted "Tigranes".

That's proof enough for me that you own the CDs. I'll look on my case and manual, to see if I have a CD key.

(Is this ok? )