2002 Opel Astra COOLING MODULE

DEAR SIR:

My Opel Astra has a Warning for Cooling Motor Module, I checked all fuses of the module an all is OK.
I need to change the module but some people say to me that is mandatory program the module because if not work. I need to know if I can replace the module by my self or need a special tool.
The other question is about some store in US that buy this part(GM/Opel # 24462343)

Best Regards

Ricardo Gatti