How to change the name of the Tab "Additional Data B" in VA02 Tcode?

Hi All,

I have enhanced the VA02 Header screen, and placed another Tab called DATA A.

Here I have two requirements

1. I want to change the name of the Additional Data B to some other name say DATA B

2. I have to add these two tabs in the menu  Go to->Header->Additional Functions ->DATA A

       Go to->Header->Additional Functions ->DATA B.

        in VA02/VA03 T codes.

How can I Achieve these functionalities, please help me.

Thank you.

Regards

Ram.