After installing a Toontrack plug-in you will need to let Cubase know where the new plug-in is installed. Depending on your Operating system, specifications and the bit depth of the plug-in the location can be slightly different.
Please note that if you choose a custom path for installation the above paths will not apply.
Once the plug-in is installed it necessary to ensure that Cubase recognizes the installation path. To set the path to the plug-in file in Cubase open the plug-in manager and enter the appropriate plug-in path to the VST Scan Path. This operation is preformed slightly different in the various versions of Cubase. The screenshots below show Cubase 5. Open the plug-in manager and click ‘VST 2.x Plug-in Paths’.
Click Add, and navigate to the location that the plug-in file is on your hard drive (default paths previously listed):
Finally, in the main page of the plugin manager, click Update and your Toontrack plug-ins (EZdrummer and EZmix in this case) should appear under the found plug-ins:
You will now be able to launch your Toontrack plug-in in Cubase.