need help on booting installer from hd media

From	Long Wind <longwind2@yahoo.com>
Newsgroups	linux.debian.user
Subject	need help on booting installer from hd media
Date	2021-02-12 10:10 +0100
Message-ID	<BHCCB-6Cp-5@gated-at.bofh.it> (permalink)
References	<BHCCB-6Cp-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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http://ftp.funet.fi/pub/Linux/INSTALL/Debian/dists/Debian10.8/main/installer-i386/current/images/hd-media/initrd.gz
http://ftp.funet.fi/pub/Linux/INSTALL/Debian/dists/Debian10.8/main/installer-i386/current/images/hd-media/vmlinuz
i have buster at sda2 and copy files above to /rootand add installer entry to grub.cfg and run grub-install
menuentry 'New Install' {
insmod part_msdos
insmod ext2
set root='(hd0,msdos2)'
linux /root/vmlinuz
initrd /root/initrd.gz
}
it doesn't work, what's wrong with it?
see https://www.debian.org/releases/stable/i386/ch05s01.en.html#boot-initrd

i think '(hd0,msdos1)' isn't intuitive

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need help on booting installer from hd media Long Wind <longwind2@yahoo.com> - 2021-02-12 10:10 +0100
  Re: need help on booting installer from hd media Long Wind <longwind2@yahoo.com> - 2021-02-12 12:10 +0100

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