
Here in the bottom center of the tech tree window, are the tech properties, which should be ok since you copy-pasted a working one.

In the tech tree window, first add them to the coresponding age(feudal age for example) in the connected researches next to the corresponding building(buildings is the second box at the left side beneath the ages box) in the connected researches, skip the units box and finally add the tech/s to the last box to the left researches(just click add to get new blank one and paste the one you copied from the crusades data in that box). Start copy-pasting it's techs, from the technologies, researches and tech tree. Open two AGE3 windows(one for the vinalla data and one for the crusades mod).
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I learned how to make it by downloading this mod.
