First off, where is there a forum for this topic?  That will probably save me and you a lot of time!  Have played Empire off and on since mid 90's.  So very interested in modding own units but always too intimidated by the  unit editor in EDEE,  but in EDCE saw some "hey I can really do this now."  So first game I'm playing and learning on, right?  Made an attack aircraft A-10 style and apache style, and changed the air transport to speed 3-that had never seemed right to me.  Weasels explanation of WW II units on here and others describing their mods is confidence building but still learning.  Someone said on one of these threads they did a hydro plant.  Thought that was a neat idea.  after a couple of false starts, on second go round, I copied the oil refinery unit(since the base programming and commands, parameters should be about the same, right other than terrain type/resources?), changed the land resource tile to rivers only, did half value(5), of the oil refinery while upping the cost and build times(bc there are so many rivers in initial set up and I don't know how to change that resource frequency to cut it down or a specific tile for it) and  imported the port image as a reasonable equivalent since I don't know how to import images into the game yet.  It shows up on engineers and seabees construction choices but won't let me click it.    Says something about no resources if I'm reading the game window description right.  How do I tell the game that rivers are the resource you can build hydro on?  or is that something like the oil seeps that have to be there in beginning of game setup?  You see a lot I don't know.  If there is a link where I can educate myself better, please let me know!!!  Thanks all and for keeping this fantastic strategy game alive, especially to you Mark!!!