How to: multiboot

Hi to all,
I wanna be a new user for this OS, since it is quite minimal as well as it seems to have a lot of potential.
I’m a brandnew user, thus I dunno anything regarding Haiku.

This is my partition scheme:

/dev/sda1   *           1        5100    40960000   83  Linux
/dev/sda2            5100       11474    51200000    7  HPFS/NTFS
/dev/sda3           11474       60802   396224513    5  Extended
/dev/sda5           60292       60802     4096000   82  Linux swap / Solaris
--> /dev/sda6           58380       60292    15360000   83  Linux <--
/dev/sda7           11474       58380   376767488   83  Linux

I wanna install it into the highlighted partition and then I want configure grub in order to boot it. I read something regarding extended partition, but I read with multoboot there shouldn’t be problems

I installed it in Virtualbox: how can I deny the installation program to install its own bootloader?

thank you in advance

Haiku will not install bootloader. It installs a boot sector to the Haiku partition.

“Boot sector has been written to Haiku” means that Haiku’s partition is made bootable.

Under VirtualBox, in terminal type BootManager to see how the bootloader is installed. Bootloader will not install unless you click the install button.

Bootloader (MBR) will only install if BootManager is run and you click install button. Otherwise no bootloader is ever installed to the MBR.

The install guide is kinda old but should help you out.
https://www.haiku-os.org/get-haiku/installation-guide