Silly bootloader question

I have a multi-boot system that uses grub2. I was unsure what crunchbag would do if I let it install a bootloader off the live CD I had the installer not put one on.

I just read this thread

http://crunchbanglinux.org/forums/topic … some-love/

and it seems I must log into my main linux, and then somehow install a bootloader to the crunchbang partition and then run update-grub from the main partition so that crunchbang is added to the main grub menu.

Is this correct?

How do I install the bootloader to the crunchbang partition?

I am currently in the process of installing lots of linuxes to play with them, so a general procedure of how to install them so that they place nice with the main bootloader would be greatly appreciated.