I just installed Bodhi 3.2.1 on a notebook, that offers UEFI booting and it took me quite a while to find out how this has to be done. I assume I am not the only one (not so experienced) who runs into this problem. Thus I recommend you explain how it has to be done in your installation guide to make sure no one thinks "Damn, Bodhi is not even in grade to provide a working installation process - I give it up, I better go for windows...".
You could put something like the following to the paragraph "II A Prepare your computer":
1. Enter the BIOS and set UEFI booting to "disable"
2. Reboot and enter the BIOS again to set the boot sequence. Note that to start the installation process (step "II B Reboot to USB") you have to boot from the USB stick but after the installation (step "II C First Boot") from your harddisk. There are 2 alternative ways to do so:
a. set the BIOS‘ boot sequence for the installation (step "II B") to „first: USB-stick (stick must be inserted before booting to do so); second: your hard disk“ and later when it comes to the first boot (step "II C") to „first: your hard disk“.
b. set the BIOS‘ boot sequence right away (step "II B") to „first: your hard disk“ and use the hardware boot manager (if existent often F7) to boot for the installation from the USB stick.
Futher I propose adding a link to the installation instructions in the right column of your main page, right after "Which file do I need?" and "Systems requirements".