Originally Posted by jefro
Create your virtual appliance and move it to or create it on the usb. Files are files in this case. What a virtual machine would use is a virtual filesystem which is a file or group of files.
Examples already can be downloaded usually of pre-built virtual machines.
I got it loading in virtualbox already, but I'm running into an unrelated problem. Universal USB Installer 1.9.5 installs an old version of syslinux (4.07) so it doesn't boot the OS. I've been looking forever but have no idea how to update syslinux to 6.x, or update the installer files so it installs syslinux 6.
EDIT1: Installed ArchLinux in a different way and got syslinux 6.02 installed. Now getting "no configuration file found".