Thanks for the reply Sacha,
I've never had to go over 100kb before so not really sure about load times etc. The file will be encrypted when finished so perhaps that's compression?
I guess one thing I thought of after posting was that it would also be good to cut down on the amount of thumbnails shown as 60 looks quite intimidating and this tour will eventually get to 90 - 100. I've seen tours before with that amount and more thumbs and it kind of puts me off. Too much of a good thing.
or have one scene load an xml to another hall.
I'd have to create a new tour2.html with tour2.xml (containing 30 scenes) and add the same 4 includes as the original tour.xml? Or is there another way to load another xml file from a scene and skip having to create a new html file?
There's also Andrey's wonderful scrolling map to navigate with so they may even decide just to hide the thumbnails