Custom Firmware for UA40C6900 so as to use Wifi Adapter

[gurpalsc]

Dear All,
I was going through the wiki page for using non samsung wifi adapter.
However that page talks about chipset from specific manfacturer.
I have a UA40C6900 and would like to use wifi adapter made by Realtek semi conductors. ltd. (RTL8192Su)
I understand that VID and PID has to be changed on the device. But it seems that i am unable to make it happen.
So i was looking for a custom firmware which may already have my device or all devices enable.
My Tv has foll. firmware 2010/04/05-001005
plus i also found this dont know if this is relevant or not T-VAL6XDAAC 1005.1

It would be kind if anyone can help me with this.
regards