*shrugs* Well, don't you think that it could be
the same files?
But, oh, well, I'll research the issue further.
...Hmm, I wasn't able to found 3-disks version. There are only 3.5'' (one disk) and 5.25" (2 disks) around. And even 2-disks haven't double files.
Also, both versions can be installed on HDD with "install.bat"
Is your version different,
anubis266?
I can guess that "Characters" is this third disk maybe, with saved games/characters? What are exact name of this double files? Are this, by chance, have *.TPW extension? In this case all of them are saved characters.