Fullbanner, thank you very much for this almost instant reply!
To be honest, I have already found a way of making the root of the HD in any folder I want (sorry for my unstructured English - haven't slept for all night) and I also tested these setting for Russian to be shown properly, but they don't work.
What can it be I'm doing wrong? Can you, please, check it yourself?
Thanx for the list of setting, I'll try them later in the afternoon.
What about ctorrent? Is the problem of its getting stuck solvable? And I'd really like to have GUI for the Ctorrent as well, so I can't wait for it to be included in your firmware. Any ideas about the terms? 
And since the FW isn't yet ready, I'd like to share my own solution for faster torrent files adding:
1) Connect using FTP to your external HD, go to the Ctorrent's folder (/var/harddisk/asus/ctorrent/bin) and upload your *.torrent file (better if it's short name).
2) Open your notepad (or any other PLAIN text editor) and insert the following code:
Set oShell = WScript.CreateObject("WScript.Shell")
oShell.Run "telnet.exe 192.168.1.1"
WScript.Sleep 3000
oShell.SendKeys "admin" & chr(13)
WScript.Sleep 1000
oShell.SendKeys "admin" & chr(13)
WScript.Sleep 1000
oShell.SendKeys "sh" & chr(13)
WScript.Sleep 2000
oShell.SendKeys "cd /var/harddisk/asus/ctorrent/bin" & chr(13)
WScript.Sleep 1000
oShell.SendKeys "./ctorrent -e 12 -C 8 -p 6881 torrent_name.torrent"
and after save it as Download.vbs file at any place it is convenient for you.
By launching the created file the command window will open, telnet to your box, proceed to the ctorrent folder and insert values needed for download. All you have to do is to change the name of the torrent file to be downloaded and hit ENTER. Voila!:) It'll save you some time and protect you from possible mistakes.
Hope this will help somebody.
P.S. I don't know Visual Basic at all, so don't judge me for methods I quickly found to solve the problem.