Support fo Traditional & Simplified Chinese file names

I support students from the People’s Republic of China and the Republic of China who are studying in UK. Naturally I have a lot of files with file names (and possibly content) using either the simplified or the tradition Chinese character set. I guess I missed the step during installation which gave me the option to include support for these character sets. As a result all (I think) file management applications on my OS 11.1 + KDE 4.1 system have a conniption when trying to transfer files from Windows computers on my home LAN. Usually they tell me that the file doesn’t exist (a bit strange, since they are processing this non-existent file!).

How can I overcome this? Is it just a question of adding the additional language support? And how is this done?

(btw a quick search of all the posts in this forum finds no reference to this problem -is it just me, then?)