When I first started playing this game I found it almost impossible to beat. So, here is an explanation on how to even the odds a bit by editing the xml files.
First, right click your start button on windows xp and goto "explore". Now navigate to c:/program files/Glest_2.0.0/techs/magitech/.
Now you will see two folders, magic and tech.
For the sake of this howto we will enter the folder 'magic'.
Once under the magic folder you will see three more folders and an xml file.
Enter the folder named 'units'.
Now you will see a series of folders named after characters and buildings.
For the sake of this howto we will enter 'initiate'.
BTW 'initates' are the builders, or 'mages'
Now in this folder you will see 3 more folders and 2 xml files.
Open the one called 'initiate.xml' by double clicking it. Note it should open in internet explorer by default.
Once in internet explorer you should recieve a security warning (ignore it).
Now right click anywhere on the screen and goto "view source".
This will open in notepad.
Now in this code you will see "resource name="gold" amount="75"/" commented out.
Now you can change the number "75" to anything.
Example: "resource name="gold" amount="10"/"
Now simply close notepad and click "yes" when it asks you to save.
Lastly start your game. Your workers should now cost 10 gold or whatever number you chose.
One final note is that your version "glest_2.0.0" may be different than mine like "glest_1.1.1". Have fun and dont cheat too much.