Note the "Load CTG" button highlighted in the image. When you click the button you get the "Load CTG book" dialog box. Locate the CTG book you want use in Rybka Aquarium and click OK. The following screen is displayed.
Here you can select data from other Rybka Aquarium trees which will be displayed in the tree window along with the data from the CTG book. After selecting the columns, click Next.
Normally you would just click Finish here without changing anything, but you do have the option of changing the configuration name if you like. It could be useful, for instance, if you plan to create different configurations based on the same CTG book.
The new configuration will be created and displayed in the Tree window and can also be used in engine matches etc.
CTG books cannot be edited in Rybka Aquarium and changes to move colors etc. are not saved.