Maybe I do not understand your question correctly.
I deliver the tour, a client put it on the web server. No one minds the name of a folders or paths of a tour. They just start index.html and enjoy the tour.
Inside the tour there are of course czech or polish characters without problem.
Here is my tour in your language.
http://www.virtualczech.cz/hejsovina/
Is the tour OK? And why would you mind as a customer the names of folders or paths?
If you speak about name of a JPG picture, I always worry not using czech letters.
mARTIN