Playing via External CD Drive

[Cod]

Does this game run well (or at all) via an external disc drive (USB 3.0)?  If not, is there a legal way to play the game w/o a CD?

I recently bought a new laptop that includes dual video cards in place of an internal disc drive (Lenovo y500).  Also, I should note, I still have the CDs and serial numbers for my SC4 and RH discs.

Any help is appreciated.

[metarvo]

My previous computer's CD drive stopped working, so I bought an external USB DVD drive rather than replacing the existing drive.  The game worked just as good on the USB drive as it did on the built-in drive.

So, I would say that you should be just fine using a USB CD drive. 

[Cod]

Awesome, thanks!  Guess I'll stop by somewhere today and pick one up.