and finally for tonight, I've added the use of custom parameters for Startup-Sequence launch, see README.md to see how it's used.
I have prefered .whdl
extension over .prefs
if you don't want to reinstall you just need to update whdlGenerator.py
For the next problem (https://github.com/Voljega/amiga4recalbox/issues/5) of the saves during game (but I'm not sure it sill solve the issue as when saving in Theme Park the save file appears during the game and not after quitting it) you can try to edit WHDLoad.prefs
in /recalbox/share/bios/amiga/whdl/S
and just remove ;
before NoWriteCache
see if it changes anything