Thank you, Philippe, for your very helpful feedback and your test file. 
As result, the current version has some new features:
As result, the current version has some new features:
- [colorOrder=ABC] to specify the color-sort-order; ids must be separated by "," and can be merged into the same ranking by "+" (e.g. "0+256,3,4")
- [step/equalWidth=0/1] to make width of all columns in one container the same.
- [step/fillWidth=0/1] to to make multi-column container use the complete available width.
- New command "dirbom" to build a BOM manually (if you want the BOM to be in special order, want to replace parts or set special part rendering parameters, want to ensure page/column breaks...).
- New directive concept, at the moment only directive "pli" is available to build pli manually (if you want the PLI..., see "dirbom").
- Added tooltips for most options in the GUI.