Default [Q] Titanium Backup - Segregate Apps

I am wanting to create a separate TB file for apps I want to archive. I don't think I want these mixed in with my general backup of the whole device. I will, from time to time, want to add apps to this archive version of the backup. So the archive and the current file for TB will need to coexist and I will need to switch back and forth on the same device.

Can anyone tell me the easiest way to accomplish this with TB?