how to change the display grub loader?

1. open the file system / boot / gfxmenu
2. extract the files here linuxmint.message
3. open the file linuxmint.message_FILES
4. select the image named background.png right click on the image and select open with gimp.
5. Edit the image as you please. If you are finished click save. (Not save as) and then exit.
6. After that right click on the site and click open terminal.
7. after that write the following command sudo ls. | cpio-o> (write the file name you want to make here)
8. after that open menu.lst
9. then edit in the gfxmenu = / boot / gfxmenu / linuxmint.message_FILES / name of the file you created earlier.
10. then save and reboot the computer.

Good luck. ^ ^
note: images must be sized 800 X 640
254.000 resolution