According to the folks at LSU; Katrina's track wasn't the perfect scenario to flood New Orleans; that track at present would require Gustav to make a very slight job to the "LEFT" and come in through Jefferson Parish and skim the Lake to the west. Reason is, on this approach; winds are from the southeast and then the east piling all that water in the Lake Ponchartrain; as the winds veer to west and all that water overtakes the southern shore and thus flooding New Orleans conventionally. Everybody has to remember NO did very, very good up against Katrina with the western flank eyewall just skiring the city which is the weaker side and weaker due to relative movement. If Gustav comes ashore west of the city; you can tack on the additional forward speed to the wind velocity on the east and south side. Right now, as of 0807Z, Gustav is right of forecast track and on a heading of 320 to 330.