[sufue]

I too, just a couple of days ago, had a couple of old .chm files that I wanted to convert to ePub and I too had trouble with them in Calibre. I searched a bit and found a program called Xilisoft CHM to ePub converter, and (with a bit of trepidation and lots of virus scanning, since I couldn't find much about the company) downloaded the trial version.

Happiness!!! It easily converted my two old .chm files to ePub files, which I then was able to import directly into Calibre. All the pages were there, with the links and everything. There is a bit of lag while reading when going from section to section, but it's not bad. And the graphics came through well.

Hope this helps - as with all downloaded files, please use appropriate caution and scan for viruses. And, of course, YMMV...two files translated is not an exhaustive test! And, although both my books were a few hundred pages, neither was as large as you are talking about, so don't know if size would be an issue with this software.

And, oh yeah...where to find it...I'm not quite sure about MR forums rules for posting links, so want to be cautious, but if you search with Yahoo or Google, it pops right up.