ok i have tried this out, and it is great but has a weird bug in IE6,7,8 where the large image dosn't always autoload when you visit the page for the second time, a release of next version is in the works, so check back when thats ready, but for now I cant use it.
ok ive just tried this out, is promising, but ironically it has the same problem in IE browsers as above! no first large image loading. (MAY have to do with the fact I am testing the gallery on single post, or single page.)
a guy called ALEXANDER posted on the comments of the plugin a version he made, which you can download, where he adds some if is_single statements, and it then works, on single Posts, since i actually am planning to use on a single Page, is change the 3 ocurances of is_single to is_page, and now it works on pages, but broken on single posts of course, which dosn't bother me.