This has been confirmed to work on:

Sandisk cruzer micro  4GB (with U3 removed)

older PNY 1GB

if anything else works, or just to contact me, email me at burningthunderpup@gmail.com 

I installed puppy to usb, right? Well... it didn't work at first with superfloppy mode. You heard me, DIDN'T! But I figured out how to do this. No GRUB needed.

Before you begin, burn a puppy linux cd. I used Burning Thunder Pup. Boot it.