static design using dynamic query

I am developping BIRT report with Eclipse, using MySQL database.
For the sake of simplicity, i am joining CSV extracts (with TXT extension) of tables I'm using.

My purpose is to display data in a 'table' :
- day D minus 1 to D minus 8 as columns
- metrics per protocol as rows
Per protocol, I have 2 metrics to display, plus 1 computed rate.

In the report I joined,
- the 'Grid - detail' is the layout I would like to obtain, but I don't know how to :
* display the metrics I want in the correct cells. I.E. how to specify a specific column/row of a data set along with conditions.
* add row of computed data every 2 rows (rate) which is the quotient of the 2 previous rows

- the 'Cross Tab - detail2' is the way I found to display metrics.
* have the desired layout
* bind data set parameters (in the same way as with table, grid, chart, ...)
* add row of computed data (as above)

I couldn't manage with both, so I require help.