There are three WM6/WM6.1 ROMs you can flash for the
x50v.
Maglite
LennySh
Makuu
They are 3rd party ROMs and will void your extended warranty if you have any, which I doubt.
Unzip those files, if needed. And copy the .nb0 and .crc onto a SD card formatted FAT32. Access the bootloader. Then select the ROM and double tap the Action button (Center of the D-Pad).
Please look at the device that the ROM is for before flashing it! If you flash the wrong ROM for the wrong device, it will brick it.