Hi Reynold!
The best way to set it up is probably:
Breakaway Live INPUT: Sound card line in
Breakaway Live OUTPUT: Breakaway Pipeline 1
Wirecast Input: Breakaway Pipeline 1
Wirecast Output: Sound card speaker out
If Wirecast has no output, you can use my free Audio Repeater/Resampler: viewtopic.php?f=5&t=728
If Wirecast has no way to select Breakaway Pipeline 1 as the Input, then you can select it as the default input device in Windows Control Panel.
Does this help?
///Leif