Thanks for getting back to me on the issue of the layer change problem so quickly everyone. Ady, to answer your questions, I used a Verbatim 8.5 GB DL disc, however I'm not sure what program was used to burn it (it was done on a friend's iMac, which I believe runs OS X Leopard... not sure if he used software that comes with the platform or a third party program).

Also, I did not apply the fix, as I downloaded the file from a.b.starwars and was under the impression that .iso file was ok as is.

P.S. As an English teacher, I'm digging the discussion on irony... nice to see some people actually still know what it is :)