Hey there, I just found and used the perl based ebook-tools to convert a DRM-free Ereader file from fictionwise to HTML.
Download ebook-tools from cpan:
http://search.cpan.org/dist/EBook-Tools/
The readme has install instructions:
http://search.cpan.org/src/AZED/EBoo...s-0.3.3/README
You'll probably need to install a few perl modules that it needs.
Once built and installed you'll have an 'ebook' command and can simply:
ebook unpack --htmlconvert -f Barzak-LMoths-er.pdb -d moths/
Further command detatils can be found here:
http://search.cpan.org/dist/EBook-Tools/ebook.pl
Thought someone might like.
Cheers.