I have searched the forums and Net and have not found any puppy linux .iso that can be burned directly to a USB stick to make a live boot of puppy.
I only wish that the Puppy Dev's would create a good Live .iso that could be burned directly to a USB stick. Maybe they have but I've missed it. But so far as I can see it's not available. That puts a great disadvantage to the average user. Who might make good use of Puppy Linux. As most newer laptops and even desktop are no longer shipping with CD/DVD drives.
If you do a search of how to make a live USB for puppy you get a lot of hits but it's mostly way above what most newbies can handle. Just MHO.
Hope someone can help.