I would like to suggest to you something. In one of your notes before you’ve complained about shortage of bandwidth due to enormous download of scanned original "Porter manual" pages. There’s no wander because almost every file is close to 1 Mb. Multiply number of users with size of files!
Can you decrease pictures dpi? Right now they’re at 200 dpi, so to say “right out of scanner”. It’s usual for pictures posted on Internet to be 72 dpi. For example: page 143 is 1,1 Mb. If you reduce that to 72 dpi you’ll get 0,6 Mb (if you keep the size of page) or if you do it in Photoshop, it might fall down to 0,2 Mb (page is lot smaller but information is still there).
I think that your computer won’t be taken as much as before by fellow "Tipo lovers" and it would be easier to download all those pages for all others.