[TYPO3-commerce] Display text instead of "Add to basket" button

[e.erol at epower3.de]

Hi everybody,
 
I've managed to setup commerce succesfully. Thanks for the good work by the way.
 
Now I've got a special problem. For some selected articles there shall be some
text displayed instead of the "Add to Basket" button on the detail page.
 
As far as I can see this is not possible via typoscript alone. Has anyone run
into this or a similar problem too and got a solution? Has someone an idea?
 
Thank you very much.
 
Egemen