How to change the name of organization unit

Hi Experts,

Need your help.

How to change the name of organization unit. ?

Although I am changing the name through PP01 for the info type 1000 but it is not reflecting in the name attribute of BP.

Also by default name it takes as Testsupport/ and it is coming from the Object Abbr, is there any option to increase the width of that field.

Thanks

Rishav