Well, indeed. Zizek is famous for self-plagiarising, but "How to read Lacan" is almost continuous Zizek-self plagiarism. I think "Looking Awry" + "Enjoy your symptom" would probably be a better bet than "How to Read...", but they do STILL contain lots of idiosyncratically Zizekian things that are not...Lacan.
Having said that, I still stand by the idea that Zizek did hel me when I started looking at the early seminars. Although, Victor you should still probably take Parapraxis's suggestion. I mean, if I had a really sophisticated understanding of Lacan, I should be able to translate your initial post (the Ecrits extract) into decent English prose, which I most certainly cannot.