I have tried several approaches. I am using Linux Mint and when I use the USB Image Writer, it doesn't work. I get a Booting find /menu.lst /boot/grub/menu.lst /grub/menu.lst error message.
I then tried using Ventoy following steps at https://itsfoss.com/use-ventoy/
FAT32, NTFS, and EXT4 did not show an .iso file. exFAT did show the .iso file, but then I got an Error 15.
Searching for a solution, I came across this thread https://oldforum.puppylinux.com/viewtopic.php?t=72564
The issue of case sensitivity came up, and I am not sure how that applies in my case or even theirs. Any ideas? If the solution is I need to add or move "vmlinuz" somewhere, where would it go?