Yeah, I was hoping someone would mention refind. It’s a great piece of software being worked on by a single developer, and it deserves so much more attention:
http://www.rodsbooks.com/refind/
For ease of dual-booting, maybe we could consider working with Rod Smith (the refind developer) to ensure Haiku works well with refind? And then we could probably consider shipping refind with Haiku to help users boot multiple OSes.
It’s also themable which means we can make our own theme for refind as well.
In terms of installation, someone has already suggested we make an installer like Wubi:
I have reached out to the maintainer of Wubi-UEFI on Github to ask if it’s possible to fork the installer to make it install a non-Ubuntu OS.