At last I finished work on 1204 scenario. Now it works without problems. You can play for Latin Empire or for duchy of Athens or for Empire of Nicaea. Friedrich II Hohenstaufen, John I Lockland and other famous rulers are available to play. I have added many new dynasties(de Chatillon, de Montfort, de Montmorency, de Joinville, de Dreux, de Guines, de Villehardouin, de Brienne, Komnenos and many others), some separate characters( for example, Thomas Morosini), claims and other important things. New separation of kingdoms, new province ownerships, new impressions .
Great thanks to WanV, Birger and Cuke.
It works on last beta-patch(August 15 BETA PATCH). Add new files and replace old. And don' t forget to backup original files.
See the attachment.