Matrix: Can ECS software detect an i-station with 3 or less display key modules?

Question - I have an i-station with two display key modules.  When it is connected to ECS 5.2 the panel programming screen shows 4 display key modules.  Which two modules should I program on the ECS panel programming screen?
Answer - use the two modules on the left hand side of the panel programming screen, that is module one should be the left hand most module that contains the CLEAR and ANSWER keys and next most left hand module.  That would provide the user with 14 programmable keys on the i-station.  If the user programs the next two modules in ECS the ke