Making a contribution about register domains

[fasiso]

I am making a contribution about register domains because actually no works ok, but I have a problem. I explain;

 

I have one product for example "Register domain" and I need and atribute with the domain name. How can I send and atribute or something similar with the domain name that we take before.

 

Thanks for your help.

[fasiso]

Only I need that in the action=add_product or action=buy_now send an additional parameter which value is the domain name.

 

This parameter must be progress till the end of the order and save at order information.

 

TIA.