We have found a case where the OPSSQL installer would not pick up the product family(lite, express, pro, enterprise) and would automatically ask for the SQL server name instead of letting you select which components to install. This was a case where OPSSQL was being uninstalled and installed on a different drive. It is believed that a temp file created in the Windows directory does not get overwritten when the installer is ran again.
If you experience this go to the C:\Windows folder and delete the file named setup1.exe.
Re-run the OPQSQL installer and see if you can now select which client and server options you wish to install.