Implementing ITIL

My company is starting to implement ITIL. I'm the IT training and implementation person for the company. We're projectiong 18 months to implement Incident, Problem and Service Desk. I'm creating a timeline or schedule over that 18 months to put out information, or train the company's employees on what to expect from ITIL - how it will benefit them. Anyone ever do this before? Suggestions? Training topics?