CM03/04 was to be the final release of the Sports Interactive/Eidos partnership. It was a more complete version of CM4 and laid the basic foundations of what became the Football Manager series.
Championship Manager 03/04

Released: November 2003
Notes: Last game of Eidos/Sports Interactive partnership
Podcast (same as CM4)
Why we love CM03/04 – The words of @CMMourinho
Blog – By @RossBell1984
Instructions: Similar to CM4, if you’ve got the CD it should just be compatibility settings. Full instructions to follow.