How to update profile parameters for many users at once?

Hi Everyone,

I am running Windows Server 2008 R2 as standalone but with Domain Controller setup. As you can see in the picture below all my 75 users do not have anything setup for "Start the following program at logon:". I would like to add something there and tick the check mark. How can I automate this job rather than going through each and every user login?

Thanks,