Customize FTDI driver for custom PID and VID I have changed PID and VID of my FTDI board for  arduino program because i wanted to rename the com port name.
The ic is  FT232R a USB to serial UART interface IC. I have store new vid and pid to EEPROM.
Now It is showing in unknown devices. I am not able to update driver of it.
I have followed this article http://forum.arduino.cc/index.php?topic=6929.0.

Can anyone tell how to make cutmoize driver for it.
Any suggestions will be very helpful.
On Windows

You can refer to FTDI's documentation here for details on how to create your own custom device driver. The FTDI website has a lot of resources for this, however they seem to be a little outdated. Microsoft details how drivers work in it's Hardware Dev Center.

On Linux

On Linux it may be as easy as registering the device with modprobe. For example, for a device with a VID of 0102 and a PID of 1234, execute the following from the shell:

modprobe ftdi_sio
echo "0102 1234" | sudo tee /sys/module/ftdi_sio/drivers/usb-serial\:ftdi_sio/new_id &gt; /dev/null