I could just create three characters named Essence, Channelling, and Mentalism and add all the realm lists to 50 as a work around.
If you want to prepare the sample characters beforehand, there is a more practical way for your players to access the spells, and it's already available in the current version:
- Create the 3 characters, add all spell skills, give them 50 ranks in each.
- Start a new adventure, and add the 3 characters.
- Have the players access the character status module with their phones/tablet/notebook, and access the spell book module by clicking on the spell book icon at the top of the spell section. That interface is much more suited for your needs.
Bonus points if each "realm" character has an avatar corresponding to the symbol of each realm.