I don't particularly know of a solution for adding the MemTest menu item itself, but I can guide you on how to add a new menu entry.
FIrstly, you will see here in your grub configuration the line saying menuentry "Puppy fossapup64 9.5" {, you will have to add a same one for MemTest. For example, your file may look something like this after editing:-
Code: Select all
menuentry "Puppy fossapup64 9.5" {
[bunch of stuff]
}
menuentry "MemTest" {
}
Note: The text inside the 'double-inverted commas' is the name for the menu entry. You may even change the name of your current menu entry for fossapup .
Secondly, there must be something inside the menuentry "MemTest" as well, just like menuenrty "Puppy fossapup64 9.5" has (I mean inside the curly brackets of that menu item). I've understood them as some sort of commands, but don't know which specific command may need to be put in here.
I'll try searching it on my own Ubuntu laptop and update you if I find a "MemTest" menu entry in this grub configuration file.
EDIT: I searched my system and did find a menu entry in Kubuntu for "MemTest", but I don't think it might be of much use to you. I'm afraid you'll have to search for it yourself, unless someone else helps you (and I believe that someone will , this forum's members are always there to help you).