OK now heres a sort of tutorial:
Get the water segment from FPS-Files.
then place a simple floor segment.on the same layer place a water entity but adjust the hight with Page Up/Page Down buttons,if you think its high enough then replace the floor segment by an invisible floor segment and go one layer down,then find a nice texture for the river ground and place that as a floor.At the end place some edges around it and test game!
if the height of the water is too High/Low adjust it until you think its good.
Hope this helps you all out with the "Swim in the water" problem
[href]www.freewebs.com/edromeproductions[/href]
look there for all my model packs latest updtes and other stuff!
(its not old yet)