Okay, so I know how to set it so you can open any type of file from any program...... But here's the thing. I want to open .nds files with no$zoomer and .gba files with vba. I set the .nds files, but when I went to set the .gba files.... I went and found vba. I clicked to put it on the list. It wouldn't add to the list. I tried another .nds emulator and that one appeared in the list, but every time i went to do vba it did nothing! Help! Also, when I was attempting to set .gba files somehow I had clicked on no$zoomer and clicked ok, so now they're set to no$zoomer like I didn't want.