Change underlying datatable of PCUI fieldgroup

Hi all,

I know this is a very sprecial question, but I'm not such code guru to find a solution.

We use PCUI Applications and display them in EP. Under Accounts (CRMM_ACCOUNT) there is a Tab Page Industry Sectors (in Tab-Group ACC_01). The Fieldgroup which is displayed there is BUP_INDUSTRYSECTSTD.

Now my problem: The data which is shown in this fields surely is coming out of a table (I think it is BUT0IS). How can I change this, that shown data is coming out of another table, for example ZBUT0IS?

I hope anyone can help...Thanks!

Regards

Daniel