I found the solution. Pauls solution won in this run, as Rokas solution felt a little backwards - and not suitable for this task (I might be wrong).
First I was little confused of the numbering in the modifier stack - counting from top and down, but once I got the right order it worked.
Would it be possible, in the evolvement of the marker thing, that you could have a more "direct reference" to the selectorlist - I am thinking of a combobox with the items from the selector instead just a index number - I know it is much harder to program, but it would make the user experience much greater.
Anyway, here are some screen dumps showing my solution.
So it consist of one RC object containing two generators, one for under cupboards and one for upper cupboards. The path holds two Spline modifiers, one for each generator.
If you have comments to my solution - like fx. a better way to solve this. I am all ears