use Microsoft Visual Studio Express for C++. do not open a notepad and then paste the behavior then save it as .cs file.
Download Microsoft Visual Studio Express. Right Click server.sln open with Check Always use blah blah... then click Microsoft Visual studio Express 2010
Go to wserver>logic>db Right click db Add>New Item>Class
then paste the Behavior then Rename Class1.cs to BehaviorDb.Tomb.cs (if you have all three bosses in one class)
if one by one then create three classes.
I don't wanna post a video cause i have slow internet (65KB/s) and my computer has alot of files that i dont want other people to see.
oh and use "[img] <LINK OF IMAGE> [/img]"