I actually liked Windows’ boot manager: it’s simple that it’s stupid (LOL)

But that’s it: I’m not going to use other boot manager if there’s any Windows installation in same drive (assuming all OSes are in same drive).

For OpenBSD, it’s really easy: just read the installation faqs. 😛

For (x/k/ed)Ubuntu, there’s no instruction available but it’s not much different with OpenBSD’s:

• At installation, make SURE to install GRUB on the ROOT partition of the system (using advanced option on last step) – and take note the location (ex: /dev/sda2)
• After installation you’ll get to Windows directly without given choice for OS: don’t worry, we’ll add it now
• Go download dd for windows
• Use dd --list to see which is the Ubuntu root partition. Easy way: Harddisk# is the same as system partition – usually C: drive. Then for Partition#, use this formula: /dev/[s/h]d[a-z]#. So /dev/sda2 would have partition number 2 (Partition2)
• Then do this: dd if=?DeviceHarddisk#Partition# of=c:ubuntu.pbr bs=512 count=1
• And edit boot.ini (System Properties → Advanced → Startup and Recovery Settings → Manually edit startup file). Add line like this: C:ubuntu.pbr="Ubuntu"
• Reboot, there’ll be Ubuntu in boot choice list.
• There might be another countdown… to remove: go find it yourself 😛
• Yay finished