For Autocad 2008, here is the instruction.
1. Put The CD on CD Drive.
2. It will automaticaly autorun.
3. Then it comes up with Dialog box.
4. Choose INSTALL
5. Follow the step (and agree on each step, if any).
7. On Installation process, you must close outlook or some application
mentioned by the software. Just do it.
8. Some error detected, on installing FLASH option. Just click OK.
Because your PC is already have Flash Player.
9. Put CD 2, if requested.
11. After installation is finish, you might need to restart your PC.
Please do it.
12. Run Autocad 2008. We need to finish registration.
13. The first time autocad running, it will open registration menu.
Please proceed to activation process.
14. Put Serial Number : 666 - 66666666
15. Check the "Request Code". It will looks like this. Example : N03Z
9LNN XYCN TU53 GH3R PVE3.
16. Copy the Request code.
17. Open the file attached (Autocad-2008-Keygen.zip). There is an serial
key generator for Autocad2008, named : AutoCAD-2008-keygen.exe. Open it.
18. After running the program, paste Request Code to its place.
19. Click "Calculate".
20. Copy all "Auth Code". Paste this code in Autocad registration form
(see point 13-16).
21. Press Next.
Finish installation & registration.
Then you can use Autocad 2008.