How to move a child task using Project Server 2007 PSI?

[theArchitect]

Hi,

I am writing an application that uses the Project Server 2007 PSI API and
I've hit a roadblock!

I need to be able to move a child task from under one summary task to under
another. In the Project Professional UI this is easy, but I can't seem to
find a way to do this through the PSI.

The ProjectDataset.TaskRow class has a property called TASK_PARENT_UID which
is used to set the task's parent but this is read-only once the task has been
created and can't be updated. I don't see any other methods to allow you to
reassign a tasks parent or move a task under a new parent.

Anyone got any ideas?