Hmm, not sure how you are thinking of using this "drawing bill of material". Seems like a pretty basic thing to have so I was surprised to see that there is no such function as "drawing information" in Creo 4. But then again, I suppose I never had to use something like that before...
I think of other ways to get at this information:
1) The list of models and the active model is readily available in the status bar:
Active model highlighted. Double clicking there will show a list of models in the drawing.
2) If you are diligent about it, you can maintain a table where you reference a CAD model parameter (e.g. PART_NUMBER) each time you add it to the drawing...
Note that &PART_NUMBER was input into each row after the model was "added" to the drawing. Creo added the unique session_ID.
3) If you are using Windchill, then the list of models that are referenced by the drawing is available on its "related objects" tab.
Final thoughts:
Methods 2 or 3 won't give you the "active" model, but isn't that rather transient? The active model can change by just switching sheets.
There is also this "Hilite cur" option available which will draw a box around views that belong to the active model:
Right now we have an application that enables us to generate a table on the drawing where all or some models can be listed with an unique ID. With the new version we do not have this functionality anymore and I now trying to find an alternative method to have at least all models that are connected to the drawing - and that should be automatically.
