Hi
You had a good luck! It seems,like for me (knoppx7 AND 6) the thumdrives boot but stops immediately with a message like this one:
"No directives or UI in configuration file".
This message appears on the web for other users and refers to "syslinux modifications" which do not work for me also.
I think, like Werner P Schulz, that there is a severe bug in the script included on theses versions.
Very curiously, installing on pendrives seems to depend on the KIND of Pendrive:
it works for some ones and not for others !!!!.
It seems that the script has been better "worked" for "SD-Cards" (essentially?)
Also (even though this point has nothing to do with the post) there are some other bugs in my version of 7.4.
For exemple,at the boot, when using some cheatcodes
"=" is obtained by "Shift + @"
"/" is obtained by "shift + 7" etc.. etc...
Bye
knp