The CD image that I used was written to USB by Ubuntu's Startup Disk Creator. When booting USB, I was prompted with "not a COM32R image"
I found some help online which instructed me to press tab. This gave me text options. After typing 'live' and pressing enter, everything worked great. This was the one of the fastest live-boots (next to Puppy) and the fastest install I've ever seen (even for a CD-sized image)