OK, the galleries are back and still seem to be operating without the 700px hard code.

So take a look and see how well the gallery image display page works with full size images.

In the CSS where it says:
.gallery_display_image_cell
insert this: 
**width: auto;
**after the {

where it says:
**.gallery_display_notes_cell
**insert this:
**width: 100%;
**after the {

where it says:
**.gallery_display_details_cell
**insert this:
**width: 20%;
**after the {

I occasionally (very rarely) get a white bar down one side, but other than that this seems to work OK in IE and Firefox.

Save your CSS first in case you don't like it or make a mistake. That's all there is to it.