[TYPO3-dev] Extending flexforms by another extension

[Georg Ringer]

Hi,

I am searching for a way to allow other extensions to modify the 
flexforms of a current extension.

I know the possibility to add a new value to a dropdown field (like the 
what to display in tt_news) and of course how to rewrite the whole 
flexfrom_ds.xml. But I want to load an extra tab from a different 
extension into the original file without modifying the other parts.

Somebody got an idea?
Thanks a lot

Georg