>I am looking for a way to select several rows in a grid representation (read records). Has anybody experienced with that?
>The more windows-like it is, the better

Download the filer2.zip, which I posted into Files section here long ago. I've done a "simulate selected" there. While you can't have any sort of multiselect in a grid, you can have records marked in some way and paint them into the selected colors, using DynamicForeColor and DynamicBackColor (or the like, I never learned the exact words - they're there in the PEM window).