Changing the Horn

Since I purchased my '02 Galant, I have really liked its features, apart from the horn.
 
The horn on my car sounds like it should be fitted to a scooter, or at the very least a cheap shopping car.  So I want to change it.
 
I already have another horn from a Toyota, and I could very easily swap the two, however I was thinking about using two horns at the same time.   However this leads me to wonder if it would cause any problems running two horns at the same time, and if I need to upgrade anything else.
 
Thanks inadvance for any input to my post.
 
Gt.

IMO u can just buy and connect the wires from the stock to the new horn....should work

Well I geuss the worst that's gonna happen, is a fuse might blow. 
 
I'll hook up the second horn tommorow, and let you know if it causes any problems.
 
Best,
 
Gt