How to make Windows (truecrypt) and Debian friends in Grub?

Question

Debian

Trying to add a second Windows system encrypted with truecrypt.
But after truecrypt installs its bootloader, I can't set it all up in Grub.
Starts to swear at the lack of a section.
A piece of grub.cfg:

menuentry 'Win' --class windows --class os $menuentry_id_option 'osprober-chain-385a7226-01' {
  insmod part_msdos
  insmod ntfs
  set root='hd0,msdos3'
  if [ x$feature_platform__search_hint = xy ]; then
    search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos3 --hint-efi=hd0,msdos3 --hint-baremetal=ahci0,msdos3 385a7226-01
  else
    search --no-floppy --fs-uuid --set=root 385a7226-01
  fi
  parttool ${root} hidden-
  chainloader +1
}

Answer 1

Install on VirtualBox.