getting in to "serious" programming, help needed with ER modeling

Hi

I have been a programmer for a long time and got a MSDN Universal / now visual studio professional with pro MSDN sub.

I always used to just get straight on with programming and do what was needed, however not worked on anything that can be classed as a very big project.

I am just starting to get in to needing to do big projects and ER modeling.

I used to have Visual studio 2003 enterprise architect, and now have 2005 professional.

I was wondering if doing this, did I take a step down because I can not find anything to do with modeling, and I am sure there used to be :S

Any help here is appreciated.

Thanks