How to customise osmc

Hello All,
I need to customise the osmc code,
What i need is that before the osmc main menu, i need to display some image, decript some files etc
Someone please help
Regards
Pravi

You can just clone the osmc git repo.
Then build the packages.

You would probably need to replace the boot image and put some startupscript somewhere.

Why would you want to do this?

Just wanted to build a custom player with password restricted.
Can you help with this