Custom Editor toolbar running off edge of screen

I am writing a custom editor script toggle button for letting the player choose which enemy to appear in the level (which uses an enum). This works well with the code below. The problem is my list of enemies is now quite large and runs off the edge of the inspector window. Is there some way I can stack the appearance of the toolbar so it’s like a grid of buttons rather than a long line of buttons?

var selectedEnemy : EnemyTypes;
enum EnemyTypes { Vampire, Zombie, Monster, etc... }

var enemyTypesString = System.Enum.GetNames(typeof(EnemyTypes));
selectedEnemy = GUILayout.Toolbar(selectedEnemy, enemyTypesString, EditorStyles.toolbarButton);

Ah, I think I may have found it actually: http://docs.unity3d.com/Documentation/ScriptReference/GUILayout.SelectionGrid.html

Couldn’t find this before for some reason!