I'm running into a similar problem trying to hook up a tech for a new 'darkling camp' like tech/resource improvement.

Looks like everything is linked up correctly. So I've been trying with everything in different folders.

Hi, i have same problem.

Copy CoreArmor.xml to Mods folder, change it - all works fine, then copy and change Techs_Trog.xml - it seems didn't worked, because i don't seen change in the game

What i should do?

TechTree_Trog.xml is important or it just compilation names of techs for proper reading?

In other words, creating a custom tech tree will not be a cakewalk, sadly 

2Wintersong

hm, i don't create new techs, just add some prereq for existing

Maybe it good idea, and you be interest too. Suggestion simple: Atm techs  get very easy - so if you want get superior weapon - you spend about 5 breakthrough and get it. I am added links warfare with other branches, for example:

Blunt_Weapons_Amarian               - required Blacksmithing_Amarian additional 
Superior_Blunt_Weapons_Amarian  - required Magical_Forging_Amarian additional 
Ultimate_Blunt_Weapons_Amarian  - required Breons_Letters_Amarian additional 

So player need learn some techs in other branches for accessing to advanced tech in this, in fact for accessing Lord Hammers player need research whole tree, even adventure and magic branches

I added links  like that:

<TechDef InternalName="Ultimate_Blunt_Weapons_Amarian">
...

<Prereq>
  <Type>Tech</Type>
  <Attribute>Superior_Blunt_Weapons_Amarian</Attribute>
  <Value>0</Value>
</Prereq>
<Prereq>
  <Type>Tech</Type>
  <Attribute>Breons_Letters_Amarian</Attribute>
  <Value>0</Value>
</Prereq>
...

</TechDef>

but it just don't work, still use core files, instead of mine... hm if you say, that this should work, i train again

no, i put these files into mod folder

if you want mode files - you need put em to player directory like

"C:\Documents and Settings\user\Documents\My Games\Elemental\"

or in mod directory in root of game folder. When game start - files in this folders swap core game files. If you change  core files manually - it just don't influence to game at all.

so - all my mount and items changes works well, but techs don't work, maybe some errors in xml files

I think no, perhaps value - is lvl of technology. But dont'sure, anyway all technologies have preq value=0

The folder you want to create in the Install Directory is actually called 'Mods'

You can also use the Units folder in the My Games/Elemental directory.

okay, yesterday someone in Impulse chat give me the clue, how i can use my techtree

Remember? CoreArmor.xml, CoreMounts.xml, CoreWeapons.xml - all properly working from mod-folder, but Techs_Amarian.xml,Techs_Trog.xml - not

So there simple instruction:

1. clear mod-folder and user/documents folder from manually changed xml

2. put changes directly into core files

3. rename Elemental War of Magic\data\Data.zip  to something like data.old

4. run "Elemental.exe /CreateXMLBinary" - in cmd window, or by creating .bat file, or just change you shortcut

5. start new sandbox game, wait for a while in loading screen (it not infinite loop, just take time)

6. enjoy. And spot data.zip created

So this work, because data.zip contain cache of game, for rapidly loading (else you could wait for long time loading everytime you start or loading game). Rebuilding cache will resolve a problem

ok, but if you need some core tech (for rebalancing) - you need new file, yes?

but it don't work

try copy you Techs_Amarian.xml to mod folder, change 1 letter and try spot changes in game. It don't work

so you need rebuild cache for rebalance tech mods