Does it works if i destroy my buildings myself, like a test, or does it have to be destroyed by the enemy?

Buttons beside the activation of mod in in-game menu

how do you change load order?

Yes, I was not able to find the right link between them. Some looked like it changes building materials when they were destroyed others were too bright to look destroyed. Though I updated them last night pics (uploaded) to some what match them.

I think the reason you suspect some look ugly is because of the sudden color changes. Take the palace for example, it's mostly dark burned brick then suddenly the portico is bright gold and suddenly the roof is a stark white. There is too much contrast. Just take the textures into Gimp and play with the coloration and brightness to get them to blend better. Other than that, this looks great. The texture resolution is good and I really like what you've done with the vertical windmill sails. The market also looks fantastic, there is a real sense of fire damage and collapse.