Something else about the redjet. It goes nowhere near Southampton Docks. The terminal is near the River Itchen - you seem to have added about 25 minutes to the journey time. I used it to commute to work each day, an extra 25 minutes would have made me hand in my notice.
You are incorrect, Red Funnel has two terminals in Southampton, Terminal 1 for Car traffic which is based alongside the Royal Peir - this is correct in SS08, Terminal 2 if the High Speed Passenger service and it is based on Town Quay - this is the home of the Red Jets, however it is not correct in SS08 as the pontoon does not exist. Both Royal Peir and Town Quay are on the River Test (thats the one that continues up to the container port).
There was a time when the Car Ferry ran into the Empress Dock (off of the River Itchen) but that was (and still is) used when the Royal Peir berth is unavailable for one reason or another.