Campaign Background? O_O

[Zelda95]

hello there, i had an idea floating around my mind for a while ever since i started making my campaign, i dont know if it can be done or not but how about editing the "background" of a campaign? for example open your warcraft the frozen throne, go to campaign and the night elf campaign, you see the archer standing behind? how about somehow changing it! like instead of the sunkin ruins turning it into silvermoon ruins and replace the night elf archer with a high elf one? :O
i dont know if sounds can be changed too but is this possible?

 

[Aeroblyctos]

Yeah.

 

[Hawkwing]

At the moment I forget how to change it, but I know it's very very very easy. So yes, it's possible.