Microsoft SQL server 2005 Express setup failed to launch

"Microsoft SQL server 2005 Express setup failed to launch". 

1. If you have already installed your P6 in you computer uninstall everything including the MSQL 2005 Express from your Control Panel.
2. After uninstalling, COPY the "MSSQL$PRIMAVERA" from other computer and PASTE it to "Microsoft SQL Server" folder which you can find in "C:\Program Files". Do not delete this folder during uninstallation of P6.0 In the same folder, you can find also "80 & 90" folders plus the one you paste "MSSQL$PRIMAVERA".
3. Now, install again P6.0 to your computer. Just follow the installation wizard