Then here's how ya do it:
Download and install BeOS personal on your windows or linux PC. It will install to an ISO image on your hard drive. From here you have a couple of options. Burn a cd using that ISO image, then boot the IO with that cd and install to a hard drive you've hooked up to the IO, or 2, get a laptop hard drive and adapt it to plug into your PC. Then run installer from BeOS. Installer will create a BFS (Be File System) on your hard drive and install the OS. Unplug the hard drive, plug it into the IO and boot up.
You'll need the hacked Blade3D drivers for Cyberblade i7 chip, but good luck getting it. http://www.bebits.com took it down a couple of months ago and I haven't been able to get my hands on it since. Everything else at least *seems* standard and would work okay from square one.
Too bad we don't have anyone around with a knack for writing drivers. Getting an ethernet adapter to work on the IO might make for a legit portable BeOS machine community. :\