There isn't a readme, but you can read the nfo. Just right-click on the nfo -> open with (openen met) -> WordPad.
You just need to rename your rom to xpa-lzst.nds and drag-'n'-drop it to the batch file.

Edit: I've noticed you use an M3i Zero.
I don't know if the patch works with M3i Zero. But you can always try to see if it works.