Again, a question about crosstabs

I managed to have 2 business objects in my report: one parent and one child.
In a databand, I've placed variables from the parent object and a crosstab with variables from the child object. The goal is to display 1 mini-crosstab per variable from the parent object.
It is working great, except that I would like to hide the first column (which is already in the databand) and the headers of the crosstab (if they are displayed only once in the header it's enough). I'm joining the small tool I'm using (run SamplePOCO.exe), with the report example:
Thank you for your help.