Hi,
follow these simple steps to change default program for JPG files:
1. right click on your JPG file
2. mouse over "open with"
3. then mouse over "choose default program"
4. now select the program from dialog box list
-if program is not on that list use "browse button" to locate your program
-make shore you check "alway use selected program to open this kind of file" box
5. now click OK
if you want to uninstall windows PhotoViewer future in windows 7 delete following registry key:
HKEY_CLASSES_ROOT/SystemFileAssociations/image/ShellEx/ContextMenuHandlers
(as always, make shore you make backup before)
cheers!
codekiddy