I don't understand the question. The described way is exactly the one jasper wrotes in his blog post which you linked too at the beginning of your question.
> a person tells me that he can do it by using only OpenBSD . > he says that you do not use 'whole disk '. > > i was given a goot hint . > > not using linux? > > 0)i wii install openbsd to USB HDD (sd1). > > 1) boot PC by openbsd 5.8 snapshot CD. > > 2) install but Partway > > 3) when install cd0 , cd1 appear , push ctrl +c and go to shell . > > 4) fdisk -i -b 960 sd1 > > 5) agein restart install by 'install' > > 6) when # appear , > > newfs_msdos /dev/rsd1i > > mount /dev/sd1i /mnt2 > > mkdir -p /mnt2/efi/boot > > cp /mnt/usr/mdec/BOO* /mnt2/efi/boot > > 7) reboot PC > > there may be mistake , please tell them . No, see at the beginning. > and > there must be more more sophistcated way . Sure, read the FAQ and, use ! instead of ctrl+c to get a shell without to re-run the installer. > > addition > A) look with *********LINUX************* > fdisk -l /dev/sdb > > /dev/sdb1 64 1023 480 ef EFI > (FAT-12/16/32) > /dev/sdb4 * 1024 240107489 120053233 a6 OpenBSD > > > B) openbsd has ***grub*** package . > use this to boot linux > sarcasm/ My prefered way for Linux users : 1.) sudo cd / && rm -R * 2.) drink a coffee or a beer or more. 2a.) Coffee tastes perfect if you have http://www.linux-onlineshop.de/Fanartikel/Tassen-/-Keramik/Tasse-I-love-Linux.geek 3.) throw the UEFI machine out of the window. 4.) Use or buy a machine without UEFI. 5.) Install OpenBSD without tweaking around. 6.) Be happy till you are old and frey. /sarcasm Sorry, but I needed that.