A possible solution for cooperation mechanisms is the implementation of Wiki's or ChangeLogs into the Modeling Tool.

An Explanation on how to generate a Wiki out of Process Models can be found in the following thread:
Wiki Generation out of Process Models

A mechanism that logs the creation and deletion of objects and alerts the user by sending a sms to a specific phone number was developed and presented in this thread:
Changes Logging - SMS 

Similar to these solutions, more cooperative and collaboration mechanisms can be developed and implemented.