Always open with ?

ok here is the thing ...

when you right click and let say that you want to open all your HTML files or CSS files with a certain program.

I use the Right Click + ALT and it give me that option .... but the thing is that is just open that file with the program that I want all the other files with the same extension still open with a different program that I dont want to use ...

There is way in OSX that you can tell OPEN all my CSS or MP3 or whatever I want with this "X" program ...

Thank you.

 

thank you!