Philips 28CL6770/25Z option codes and PAL system change

[JamesQB]

FL1.10AA chassis

Hi

I need to change system on this set from UK to whatever it calls the Pal BG system to have sound output in Spain.

Apparently changing one of the option codes will allow the system to be changed in the install menu, where at present it claims only UK system is available.

Does anyone know which code needs changing and what to?

Many thanks
James