User Exits in RV45PFZA for TCODE VA41, VA42..

Hi all,

I need to write my own code in the 'USEREXIT_SET_STATUS_VBUK' in Include 'RV45PFZA'. I am not able to change the code as it is a Standard SAP code and it asks me the access key. Now The question is :

1. Do I have to request for the Access Key to make this change?

or

2. Do I have to Create a Project in CMOD?? If I have to, then where will I find the Enhancement name or the Exit Name. I tried all the methods proposed in the earlier forums but have not been sucessful in finding the right exit.

Have any of you worked on this or on something similar?? This is urgent. Your invaluable suggestions are greatly appreciated.

Thanks in Advance,

Raj.