Support for Flydigi Vader 5 Pro

[DD1FIGMENT]

Hello. This is about support USB and dongle support for the Flydigi Vader 5 Pro. I took the code from antheas and changed product ID, so if i edit
/etc/udev/rules.d/99flydigi.rules and add
ATTRS{idVendor}=="37d7", ATTRS{idProduct}=="2401", RUN+="/sbin/modprobe xpad" RUN+="/bin/sh -c 'echo 37d7 2401 > /sys/bus/usb/drivers/xpad/new_id'", reload the udev rules
udevadm control --reload-rules && udevadm trigger
the device functions.
I am wondering why this runs properly because there is no support for the Vader 5 Pro in the xpad.c file. What am i missing ? Also, can this be implemented in the xpad app so that the controller works out of the box?