Installing Bloodmoon then the Bloodmoon patch (you can get it
here) is the best thing to do.
Once you've done that open the construction set open the Data Files Dialogue box (either front he File drop downmenu or by clicking the yellow folder icon) and you should see that both the Tribunal and Bloodmoon .ESMs are present.
When you start the game make sure to select 'Data Files' and check the boxes alongside the ESMs and everything should be fine.
It can sometimes take a long time before the first attack by the Dark Brotherhood, it's based on (pseudo) random numbers, and they are as flaky as hell. Be patient, if you get desperate and want to run a test: Save the game, open the console and type in
Journal, TR_DBAttack, 10
This should bring up the message
An attempt was made on my life as I tried to rest. I do not know who wishes me dead, but the attack should probably be reported to a guard.
If it does then everything is OK, reload and continue. If it doesn't then it would appear that you have a problem; a complete reinstall may be necessary.
[QUOTE=Darth Gavinius;1096098]Distrbution of games, is becoming a little like Democracy (all about money and control) - in the end choice is an illusion and you have to choose your lesser evil.
And everything is hidden in the fine print.[/QUOTE]