Erm, I believe that it's a general consensus that it's Shadow Thieves, that the Gaelen talking to Irenicus is the same you meet in the Slums. Also, I heard that the .wav files that were supposed to be played with this cutscene don't exist; please correct me if I'm wrong about that. If it IS true, than it could be annoying, because obviously there are three choices: re-insert the dialogue, leave out ALL sound (boring), redo ALL the voices from scratch (time-consuming and you'd have to find new voices for Imoen, Irenicus, Shadow Thieves, Gaelen, and Cowlies), just put in all the files you can find and let the rest be silent (choppy). As you can see none of the options are really that wonderful. Oh, and, all this trouble for a few extra lines that really don't do TOO much to improve your gaming experience? Not really worth it if you ask me. Although, I do find it illuminating to see that this is the reason Gaelen finds out about my predicament so soon; still it's not techically neccessary, as evidenced by the fact that they DID cut out this bit.