[lastgasp]

Thank you both for the keyboard reminders; I should have tracked those down myself before posting.

Even with those solutions in hand however, I haven't been able to make the sub-projects switch from sequential [children greyed out] to parallel [all children 'active']. The parallel/sequential flag changes on the main project, and ONE of the sub-projects children change with it, but the other two sub-projects remain stubbornly greyed out.