UWL Guided Procedures and Substitution Rules functionality - how possible?

We are using Guided Procedures with Custom Web Dynpro objects and need to utilize user/role substitution that is easily enabled in other AdHoc tasks using 'Manage Substitution Rules. Unfortunately when creating and turning ON a substitution rule in the UWL all Guided Procedure Tasks are excluded and do not show up in the substituting person's UWL.

Does anyone have any ideas of how we can utilize Substitution Rules in UWL for all Guided Procedure tasks/steps?

Thanks in advance

-SteveW