Reporting Services :: Using Multi-Valued Parameters With Data-Driven Subscriptions

I have researched this question and so far have found very different opinions as to how or if it is possible.I have created 2 Data-driven subscriptions in SSRS. 1 for our sales persons and another for our managers reports. For the salespersons report, the solution works brilliantly as expected and I can appreciated the increased simplicitly for having 1 subscription to drive reports to a sales staff of over 100 folks.One the other hand, I can't seem to grasp the significance of this type of solution for the Sales managers when they have multiple salespersons that report to them.

Apparently, SSRS 2008 has provided no practical solution for this scenario that would be easily implemented in a Data driven subscription.Since I can't find a way to pass in muliple integer values that represent each of the salesreps for a single manager, I am stuck with potentially sending multiple reports for each of the Sales Reps residing under a single manager. Not very elegant or useful as I'd hoped for using Data driven subscriptions. I have even changed the parameter datatype to string and used something like:

paramSalesPeople = substring((SELECT ( ', ' + CAST(territoryid AS VARCHAR(2000)))
FROM Reports..SalesForce t2
WHERE t1.SalesManagerID = t2.SalesManagerID
ORDER BY SalesManagerID
FOR XML PATH( '' )), 3, 1000 )

To create a comma-delimited list of values for the parameters in effort of generating 1 (ONE) record per Manager. But the Data Driven Subscription fails miserably.So the question, Is it or is it not possible to have multiple values passed as a single parameter to a data driven subscription to consolidate the number of required reports into one. If not, it would seem that it should be possible since it can be done from the reports parameters drop-down menu.I have read someones recommendation to script the multi-valued parameter which seems to defeat the intent of the term "Data Driven' Subscription if I have to hard-code this logic into a script.