Make grub show its menu?

[Gene Heskett]

Greetings all;

I have an install based on ubuntu 10.04-4 LTS, with whatever version of 
grub was used then.

On boot, the esc key doesn't seem to be the show grub key, so it sails 
right by it and boots the default=0 image.

I need to stop grub from sailing right by it because it needs ro run 
memtest+ overnight as I have a crash-o-matic machine.

How is this done, preferably on a permanent basis as I don't mind a 10 
second pause there so one can select what to run.

Thanks all.

Cheers, Gene Heskett
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