hi raloszet.Thank you for your interest also.
Here are the answers.
-It has an installer you don't need to do anything.You just run the installer after you download the mod.
-You may play it.You have to do the following.
1-Open the following file with notepad:
location-Programfiles/SEGA/medieval II total war
filename-medieval2.preferance.cfg
2-At the top delete the following line:
IO files_first:True
3-Save and exit the file.
4-Right click on the file,from the properties tab,untick the option:"read-only"
5-Just run the game from mtw2.exe
You will notice that saxons and normans are made playable on campaign.To fix this go to your
medieval2/data/world/maps/campaign/imperial campaign folder.
Find there the file:"descr_strat.txt" and change the factions Normans and Saxons from playable to nonplayable.Save and exit the file.
-The mod has an uninstaller you can run the uninstaller to uninstall the mod.
-The eras are as followed and the units appear according to them.
Early Period:1080-1212
High Period:1212-1340
Late Period:1340-1530
-For now the Orthodox Patriarch act as a symbolical high level priest for the Russians and Byzantines as a counterpart to the pope.It doesn't call crusades or Jihads.