What steps will reproduce the problem?

empty USB pen with /grub/menu.lst and grub4dos installed

when it boots, for a brief second you get what seems to be a black&white default menu

find /menu.lst, /boot/grub/menu.lst, /grub/menu/lst commandline reboot halt

What is the expected output? What do you see instead?

Is there any way to stop this menu from appearing when using /grub/menu.lst?

What version of the product are you using? On what operating system? I think all do it

Please provide any additional information below.

if a /menu.lst is present I don't see this screen even under QEMU which is very slow. if /boot/grub/menu.lst only is present OR /grub/menu.lst is present, I do see this screen under QEMU for nearly a second. Users have complained about it!

Then you should place your menu.lst in the root dir, i.e., the same dir as grldr.

The accompanying menu.lst takes precedence over other menu.lst files.

Details:

When grldr gains control, it will first run the preset menu. If the preset menu has a line of "configfile"(without arguments), then it will try to load the accompanying menu.lst (which should be in the root dir of the boot device) and transfer control to the accompanying menu.lst. So this accompanying menu.lst gains control rapidly. It gains control before the subsequent "find" commands run.

If failed in loading the accompanying menu.lst, then the rest of the preset menu will continue to run. That means the menu will display and the find commands will run one by one.