yes it is possible to apply a negative value to an attribute, but that's not what I'm looking for ...
so I probably need to give more details ... as I wrote above
I'm selling products which are set in this way :
- main product is download
- attribute n°1 is CD
- attribute n°2 is DVD
... I'd like to propose discount on the CD option only (which is an attribute) ... how to do this please ?
... wht I'd like to do exactly here would be to use the admin/catalog/salemaker to create and apply a special sale of 50% in all categories with products that are download/CD/DVD option (should have at least 10 categories like this with 100 products in each of them) .... but of course the sale should apply only to the attribute n°1 : CD.
is that possible ?
is there a way, or an contrib to do this ?
thank you ...