How to use different default parameter value for different report subscriptions

In ssrs is it possible to define different default parameter values for different subscriptions? In the following example I have a report which has two subscriptions with different start date and end date values:

Report name – Testsubscription.rdl

Subscription-1

Input parameter (default values):

start_date = first day of current Month

end_date = till date

Subscription-2

Input parameter (default values):

start_date = first day of current Quarter

end_date = till date

I know an alternative way of doing this would be to copy the rdl file with a different name but I am curious whether this can be done within a single report definition file. I am using SQL Server 2008 R2 Standard Edition.

spp