I got this PDF reader running last night as part of a configurable archive database for the text version of VOS. It's probably the single most important function that requires a graphics mode.
It shells out this to utility which in turn calls two other tools and a tiny graphics viewer to browse the resulting pages.
It's not perfect - for one thing, it requires a lot of temporary drive space and then a big cleanup afterwards. This isn't always ideal for a compact flash disk like I am using. It does work, though and it allows access to an indexed PDF library on demand.