Mass change for existing personnel admin. (P0001-SACHP)

Hello,

I need to update the personnel administrator field (P0001-SACHP) for a large number people because the person has been changed. version is ERP2005 and there are several countries included but maintained only in English.

So, the infotype 0001 already exist. I also need to set the date for the change. I am not planning to conduct a pesonnel action just to use "copy" function to update this given field.

What is the best way to proceed?

BR,

Pipsa