Udev rule for changing selected USB configuration descriptor:

SUBSYSTEMS=="usb", ATTRS{idVendor}=="abcd", ATTRS{idProduct}=="12*", ATTRS{bConfigurationValue}!="2", \
  ATTR{bConfigurationValue}="2"

Udev rule for creating link and setting permissions for easier access from own application:

SUBSYSTEMS=="usb", ATTRS{idVendor}=="abcd", ATTRS{idProduct}=="12*", KERNEL=="hidraw*", \
  MODE="0666", SYMLINK+="myDeviceLink"

remember to execute

$ sudo service udev restart