Imperial battle Losing Theme Replace with SW Rebellion/Supremacy Empire Theme

[Avarice1987]

HEllo all. I Think most of you remembered the First SW Strategiegame Rebellion ( Supremacy in UK ).

I Play it now again, and i like the Theme you can hear if the Empire Losing a Battle ( it is part of the Theme during Vader Die in Episode 6 )

My Question is: How can i Replace the Vanilla Empire Battle Losing Theme with the better Losing them of SW Rebellion?