To be honest, with the prices of DVD drives these days, I'd get a new drive rather than faffing around with TV cards. BTW, the USB breakout box you are referring to there would come under the TV card category.
I understand DD's frustration here:
The Live/Audigy/2/ZS Platinums come with the Live/Audigy drive. The Live came in internal only version. The Audigy got the choice of an external version which looks very much like that video editor box, but they are not the same. The external Audigy drive is for sound only, and IIRC connects up via Firewire.