It puts graphics on separate pages. At the moment it doesn't handle external fonts. It does handle font-families, substituting the equivalent reader font for them. And yes it work on windows. It will be in libprs500-0.3.13.exe which I will release sometime this weekend. Get it from
https://libprs500.kovidgoyal.net
It's still very much alpha quality, so you may have problems, but I'll help you fix them.
EDIT: It's at
https://libprs500.kovidgoyal.net/dow...500-0.3.13.exe
The converter is accessed by the command html2lrf (it's self documenting)