You can either use the Synaptic Package Manager for this, or the terminal. In Synaptic, search for the package you installed then right-click the package and select Properties. Then go to the Installed Files tab. Look for files in /bin, /sbin, /usr/bin, /usr/sbin (basically anything in "bin"), as that will be the executable file. On the terminal you can use "dpkg -L packagename
" and this will give you the same list of installed files. So you can do:
dpkg -L packagename | grep bin
and have the answer many times faster.
However, this is not a separate program but a configuration module
To use it, open "System Settings" from the menu and in the "System Administration" group open "Startup and Shutdown". You will find a new tab for "GRUB2 Bootloader" there.