Hitchhiker's Guide to Openbsd

Windows 7
Microsoft has enhanced BCD since releasing Vista to allow multiple versions of Windows to be booted through 
bcdedit
. Because of this greater control, five commands are required to configure a multiboot environment with 
OpenBSD. 
After copying OpenBSD's PBR into Windows 7's system partition, issue the following command to initialize the needed 
registry hive: 
http://www.openbsd.org/faq/faq4.html (34 of 43)9/4/2011 10:01:58 AM

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4 - OpenBSD 4.9 Installation Guide
C:\Windows\system32> bcdedit /create /d "OpenBSD/i386 4.9" /application 
bootsector
The entry {0154a872-3d41-11de-bd67-a7060316bbb1} was successfully 
created.
C:\Windows\system32>
As admonished before, the 
{0154a872-3d41-11de-bd67-a7060316bbb1}
GUID is system-dependent. Note 
the value you receive when executing, and copy it into the following commands: 
C:\Windows\system32> bcdedit /set {0154a872-3d41-11de-bd67-
a7060316bbb1} device boot
The operation completed successfully.
C:\Windows\system32> bcdedit /set {0154a872-3d41-11de-bd67-
a7060316bbb1} path \openbsd.pbr
The operation completed successfully.
C:\Windows\system32> bcdedit /set {0154a872-3d41-11de-bd67-
a7060316bbb1} device partition=c:
The operation completed successfully.
C:\Windows\system32> bcdedit /displayorder {0154a872-3d41-11de-bd67-
7060316bbb1} /addlast
The operation completed successfully.
C:\Windows\system32>
Other boot loaders
Some other bootloaders OpenBSD users have used successfully include 
GAG
, 
The Ranish Partition Manager
, 
rEFIt
, and 
GRUB
. 
OpenBSD and Linux (i386)
Please refer to 
INSTALL.linux
, which gives in depth instructions on getting OpenBSD working with Linux.