upgrading from 4.6C to ECC 6.0. Change text in Infotype 0002

Hello Guru,

My client is upgrading from 4.6C to ECC 6.0. In 4.6C the field RUFNM text in infotype screen for 0002 is "Know As" where in ECC 6.0 is now "Nickname". The field is P0002-RUFNM? If I want to change the text in ECC 6.0 from 'Nickname' to "Know As". What is the best option? Modify the screen? or change the Data element? or any better way?

Thanks