Setting individual campaigns to have their own Sender Name

I want to be able to change the Sender Name on an individual campaign without affecting the global setting. Meaning, right now when creating a campaign, if you want to change the Sender Name, it just takes you to the global setting. I realize that I can just change the Sender Name, send the campaign, and then change it back. However, there are several problems with that approach:

• If during the time that I have the global setting changed, some registrant sends a private message to another registrant, the email notice the registrant receives will appear to be coming from the new Sender Name I have on the global setting, not the regular general one.
  
  
• I cannot pre-schedule a campaign to go with the changed Sender Name, because of issue #1. I have to send all campaigns with the alternate Sender Name at the time I want to them to go.