Hi dune1982, you can just do those steps that you describe individually, for getting the length of a curve use this:
http://kyticka.webzdarma.cz/3d/moi/#CurveLength

You can decide what length to use based on that, then with the regular Transform > Array > Dir command you can make 500 lines with the spacing you need, you can select all the lines that were just created using this on a shortcut key:
script: moi.geometryDatabase.selectLastCreated();

Then run isect and that SavePointFile plug-in.

Why do you need to combine that into a single script?

- Michael