We bought two of these rivers, plus we have the original river.
We love them. The way we do it, the starting board ends up
looking very different from one game to another.
Here is what we do. Put one spring (starting point) out, the
remaining springs to the side, and everything else in the bag or
upside down. Draw and place pieces one at a time alternating
players as the rules state. When someone draws an end, they
place it and they also place the next spring. You keep going until
all the placed rivers have ends. Sometimes this is only 2 river
tiles for each river you own, sometimes it ends up being every
river tile you own.
Note the rivers starting and end pieces tend to combine farms.
To avoid having one sprawling farm (which can make that losing
farmers a bit grumpy) we use the tiles (but not rules) from the
Count's expansion set. Then require that each river starts with a
road from the count's city seperating it from the start of any
other river.