Customer master default values

Hi every one,

Would there be a way through a set up, from a global point of view, to default some fields value while creating a customer though P03013 application?

I would like for instance to default the send statement field (STTO) to "R" whereas it's currently by default set to "C".

Where does this "C" come from ?

It's not the first value of the UDC. Is this hardcoded in the program (as the 'SITO')?

I can see in the related UDC (00/SV) we can assign a special handling code to associate each value to a field alias.

I was thinking of reversing and set the special handling code of the value 'C' to 'ALKY (alternate payor) but although it address the need at the end, it doesn't look a good idea to me because :