Custom create wizard for OOTB model

Hi to all. Please, suggest how to solve the next issue: There is a custom defined model: customModel1 which has the collection of objects of a model: ootbModel1. There is defined create a wizard in backoffice for customModel1. When I create object of customModel1 and want to create object ootbModel1 during creating the object of customModel1 then defined for ootbModel1 create wizard is shown. So, everything is obvious but I would want to have custom create-wizard for ootbModel1 which is called only when objects of ootbModel1 is created for customModel1. Does anyone know whether it is possible? Thanks