It seems to me that because of the potential Great Britain PPV market, a 50/50 share is very fair. Team Pacquiao needs to look at the take home, not the share. Getting 60% or even 70% of a fight that will gross less than half of the Hatton fight will give you much less than 50% of something huge. The larger share vs take home only massages the pride, not the pocket.
Another option is to have a 60/40 share for Hatton in Great Britain, then 60/40 Pacman everywhere else. But I reckon even with the 50% share, Manny will still take home his largest payday ever. "Para sa Bayan!", but the Money doesn't hurt I guess.