Grub2 does not have a "menu.lst" text file option and its structure is quite different.
However, there is a simple graphical tool that will allow you to do the same things with ease, with no need to learn the complexities of Grub2.
To install 'grub-customizer' just type in terminal the following commands:
You will need to accept (by "Yes") to allow adding this PPA to your repository list and also the installation of grub-customizer, but it works very well.
sudo add-apt-repository ppa:danielrichter2007/grub-customizer
sudo apt-get update
sudo apt-get install grub-customizer
Hope that helps!