This is a sample application meant to demonstrate the use of Subflow with each process maintaining its own Form table setup.
Figure 1: Process A
Process A will invoke Process B when the condition met.
Figure 2: Subflow's Properties.
The Workflow Variable from Process A (statusA) will be passed into Process B's (statusB) and will also be returned upon completion of the Subflow (Process B) as it has been set to "In and Out".
Figure 3: Process B
Upon completion of "Approve B" in Process B, Workflow Variable from Process B (statusB) will be returned to Process A (statusA).
Figure 4: Form Table Setup 
Figure 5: Demo of the workflow
Both processes maintaining it's own form table setup yet being able to access each other's dataset seamlessly.
Download: APP_subflowApp-1-20130906165322.zip