I thought about this too (that's why I didn't get my hopes up). You could download stuff from the standard client's windows map, because you'd have a good guess it was there. I thought maybe there was some safer way I couldn't find.
Actually, there is a way of doing it - as long as you stick to older versions of Netscape, which have a propriety javascript function that deals with this.
thanks anyway, we'll have to settle for manual browsing