Hi Ingo
I've had a look at both files, and as I had expected, I don't have the knowledge to help, sorry. BTW, I downloaded the large .png file once I knew the size seemed reasonable. It took over three minutes to download over a high-speed University link. I would have to say that the DSL users at home would have aborted well before the end.
I have no problem with links to larger files, as long as I know the size. But it is about marketing here - there are lots of threads competing for our time. An attached image always gets my attention rather than a link, so I'd always recommend adding an image (as well as the link to the full file), even if it is just of "teaser" quality.
And don't worry about image quality. I've posted some tragic images, as everyone will testify, hardly even entry level, but people still generously comment, suggest or ignore them, if I have caught their attention.
Cheers
Eric
ps. I use Mozilla Firefox for my IIS browsing - it's a nice browser.