Confusingly, while Eraser calls these "Custom DVD Editions", they're actually not customised versions of the 2006 DVDs but instead transfers of the US Definitive Collection laserdiscs.
More info here: http://homepage.ntlworld.com/russdawson/gtf/dvd/OT/eraser.html
Mallwalker posted ANH to the newsgroup just a couple of days ago.