How to override Short description of Structure with REUSE_ALV_FIELDCATALOG_MERGE

hi,

For ALV display, to generate field catalog out of a custom structure,I am using REUSE_ALV_FIELDCATALOG_MERGE.

But in output,i am getting short desctiption of the component types of Structure as column labels. How can I override those and put meaningful coumn names instead?

Pls help,

Thanks,

Abin