[otrs] OTRS Upgrade from 1.1.0RC1 to 2.0.4?

Hi, We use OTRS 1.1.0 for last a few couple of years. Its a great work! Now i want to upgrade it to OTRS- 2.0.4 the latest release. I am trying to mysqldump the older mysql database 1.1.0Rc1 to the new mysql otrs db 2.0.4 but it is failing. My Questions is: Is it feasible to do a upgrade from 1.1.0 to 2.04. I understand there might be some tables which would't have any data, thats Ok for me. Or i need to upgrade it first for database schema and then it is possible. On net i found a file DBUpdate-to-x.y.mysql.sql but unfortunately there is no file in HOME_OTRS/scripts/ dir. It would be a great help if someone can summarize the procedure to do such a upgrade. Thanks -Yash