First I try to do the "Delete Advent from the game" Mod outlined in the tutorial by deleting the file "PlayerPsi". But when I go to play on the Mod, Advent is still an option to play.
Are you sure you put the mod in the right folder. Use the "Show Mod Path" button to check. If so, after pressing "enable mod" did you press "apply changes"
Secondly I am playing around with the text versions of the GameInfo files, changing which ships can be built, how many levels of research there are etc... If I try to load a mod that has the text files the game freezes, and I've tried waiting for several minutes to see it if just takes a long time to load. But if I follow the tutorial
the Convertdata application for entrenchment I just get a black command prompt screen that pops up for half a second then disappears.
The files are very case sensitive, Check that you have'nt missed a letter or number some where. Even having the right letter in but not having it as a capital if its suposed to be a capital will cause a failure.
This happens to me all the time and they can be hard to track down. Using the "Dev application" helps in finding these faults and lots of others. It can be downloaded from the "downloads" section. I'm not sure if its up to date though. I have been using the one that comes with "Diplomacy" Beta. If your interested you could allways pre order that anyway.
For the convertdata I would reccamend using a " bin to txt GUI" like "harppo 99999" or "Dekhranic" has made.
Probably everyone when they first attemted moding had these very same issues, I did anyway. But if you persivere you'll work it out. Hope this helps anyway.
Edit; Its just occured to me that if you have'nt been able to convert any files yet, that you are using the text files out of the forge tools reference folder (which is for 1.03). IF this the case and you have the latest up to date version of entrenchment, they won't be up to date with the 1.041 patch. In which case you will need to make your own by copying the game info folder from Program files > Sins of a Solar Empire > Entrenchment > GameInfo. Then make another folder in the same location as forge tools or where ever you like. Then use one of the GUI's mentioned above to convert its (most) of its contents into text. harppo 99999's gives a bit of tute on how to go about it. You can find the link on the first couple of pages of where this post is now.