Sorry with the name and thanks for quick answer!
I just did a gub-setup /dev/sda5. Or better tried. I get a message that installing it into partition is a bad idea. Ok, but than it fails as it allows to install into partition only with "blocklists". They seems to be unreliable and I have to force it with --force.
Ok, but back to your setup procedure.
It did exactly this before. I go to 4th entry. But pressing "l" - nothing happened. Also when I chose sda4 before.
So if i press "l" or "L" - if there is "Don't touch" or "HDA4" before - nothing happened??
...
After some tries - I have to set bootflag first, than I can select L1 and it works!
I did it with "Don't touch".
So also Hiding works fine. Great work!!
There is only one isse: I can't boot my USB CDROM with it. Neither via USB nor CDROM. There is a message while trying it via USB, but it passes by too fast to read.
One minor suggestion: Would be nice to configure the Bootmenu key instead of a fix ESC. As ESC also affects the BIOS I have to be carefule about the timing.
Best regards