Opening A picture in a new program

[supanatral]

I'm looking to change it so that *.jpg files will from now on open in a program called jview instead of preview. I know how to change it but the problem is that it only changes the program that it wants to open in for the one file that i selected but not for all jpg's. How do I do this?

 

[symphonix]

Pick a JPG file.
Press Apple + I (or select File -> Get Info)
Under "Open with" select jview
Click the button "Use this program for all files of this type".