The Championship Manager demo will last for SIX game months, please make sure you save the game before late December. You will be able to continue the games you start with the demo when the full game is released on October 12th.
Here are the instructions to get the game running:
1. Download the CM0102.exe (which includes the English QSTART) to your hard drive (ie C:)
2. With Windows explorer run the self extracting file and when prompted select your preferred language
3. Wait for the game to install (c:cm0102demo is the default location)
4. When finished, run the game by clicking on the CM exe in the c:cm0102demo directory
Download: Primary SIgames.com download site (12.1mb) Requirements: PC CD Rom Version
Download: CManagercenter (12.1mb) Requirements: PC CD Rom Version
News source: sigames & additional info here