Your best option is to download the KLAX FSDT installer, and disregard entirely your CD. Just use its Serial number to activate it.
This is the offline activation procedure:
- Select "Register Serial" for that scenery
- Type your Serial number and let it activate, and wait. After a minute or so, it will automatically detect that there's no Internet connection, so you will see a screen asking how to activate.
- Select "Activate Using a Different Computer that has Web access" - It will present you with a serial number called "Installation ID". Save this code to a thumb drive, and go to any PC with web access.
- Go to
http://activate.esellerate.net, and type this ID into the field. It should reply back with another long code. Save this code and return to the non-internet connected PC.
- Launch FS and wait again for the manual activation screen to come up. Now select "I already have an Activation Key and would like to Activate Now". Type the code you obtained from the web from the other PC, and it should activate.