Create plist through command line
The following example creates a com.domain.programname.plist file in:

~\Library\Preferences

defaults write com.domain.programname CFBundleExecutable $value


If you want an Info.plist file this example creates one on your Desktop:

defaults write /Users/$USER/Desktop/Info CFBundleExecutable ExecutableName


You could set the path to inside the .app bundle, say it's in Applications:

defaults write /Applications/AppName.app/Contents/Info CFBundleExecutable ExecutableName


For other permutations read: man defaults