I may be wrong in this assumption, but I'm guessing you think you are doing all that needs to be done, but it seems you are not. I'm not trying to blame you, and maybe some instructions in the wiki or in the script need to be improved. In any case, my intention is to help you solve the problem.
From your own posts and from the BIS result.txt, it seems your UFD (and also your main HDD, but that's another story) doesn't contain any bootloader in the MBR.
If you cleared the UFD using the dd command (applying it to the UFD) that Shador posted, then you don't have a bootloader in your UFD. Then, using Gparted on your UFD (beware not to confuse the drive where you apply the actions!!! ) as suggested, you would need to:
1_ Create a default (msdos) partition table.
2_ Create a partition; apply.
3_ Right click on the partition and Format as FAT32; apply.
4_ Right click on the partition -> flags -> mark as boot(able); apply.
Then exit Gparted. Just to reduce the chances of some infrequent problem, unmount the UFD if necessary, wait a minute or even two, disconnect it, wait a minute or even two, connect it again and then follow the instruction of the Salix wiki about the UFD.
In the wiki there are 2 different instructions, according to the type of ISO you downloaded. Be careful to follow the adequate instructions, depending on the type of ISO: the standard installation ISO, or the LIVE system ISO.
Please report back.
Sorry, when I said to follow the respective wiki instructions, I meant for the installation of Salix to the main HDD from the UFD. So after Gparted, follow the instructions that Shador mentioned, and only then follow the wiki for installing Salix on HDD according to the respective ISO (standard or LIVE).
And, BTW, as already commented, I also suspect you haven't really used the latest unetbootin for Windows when you started all these procedures. Using the latest unetbootin for Windows with the KDE ISO should work correctly, but if not, then Salix Team would really like to know about it.