I actually managed to pick up the rpg in Manchester!!
Doesn't really help though. There's a full page for both those graphics that appear in the OVC. It looks like the whitish planet on the left is Haven, and the one in the top right is Santo, apparently (this is by comparing the cloud patterns between the different graphics).
The graphic showing the multiple systems is the nav board on Serenity locked on to Miranda, so who knows how its meant to be laid out. However, if you look carefully all the obvious gas giants have a dark side, while all the star-like objects are bright all round, and with no clouds etc.
The RPG is assuming a central star with several companion stars, all with several planets. The core worlds orbit the central star, the border moons and the rim planets the outer stars. This is the 'Verse, estimated to be 74AU across, based on comms time lag of 10 hours, tho I read on some board that the guy liaising between the rpg and film thought that was probably too small.
This is canon for the rpg, Margaret Weiss has said so, but it is ambiguous if it is so for the movie/tv. JW has said it is all in one system, but this could be taken as refering to stars in orbit around the primary as well as just a single star. So who knows? And does it really matter?
There is no FTL. Hard Burn (rpg ref) is applying the G drive to reduce mass and turning on the pulse drive (photonic reaction), but uses more fuel.
btw, the rpg is quite nifty, even if there's some annoying errata and fuzziness here and there.