Another option is to use this which is consistent with features within modern, current release PUP/DOGS since 2019. That utility USB builder contains several PUP ISOs, OOTB.
Skip the headaches of the post-processing routines and Frugal needs. Merely boot directly from PUP-DOG ISO files and do everything as you have always when using your PUPs. This is NOT a post processor where YOU must do something with the downloaded ISO(s) or with your system before booting your PUPs-DOGs.
No needs for anything else beyond downloading the PUP ISOs and booting!
Its intent is to make getting to a PUP's desktop with little to no effort and to stay consistent with modern PUPs where it works within the modern PUP-DOG framework!
No effort ... makes this too easy!
P.S. Ventoy is also a 'well-repected' ISO file booter, as well: Yet, on a few occasions, Ventoy has problems booting current PUPs-DOGs. This thread's post shows 'one' file booter that works in all known and tested current PUP-DOG cases in BIOS/UEFI PCs.
Ventoy is a more universal ISO file booter for all OSes while this solution intends to be a service for all WoofCE PUP and forum DOGs.
Please post on that thread if you find any WoofCE PUP or modern DOG that you have any problem booting from their ISO file.