@ szopin and Andre: I got the directory from posters in these topics ->

http://talk.maemo.org/showthread.php?t=79822

http://talk.maemo.org/showthread.php?t=81069

They talk about

/home/user/.ringtones

and

/home/user/.ring-tones

I decided to try again with File Manager Beta. It seems I had 'Show hidden files' unchecked it. I checked it and both (!) directories were visible. 'ring-tones' contains ringtones that I downloaded from Ovi/Nokia Store.

I found my anwser, so this topic can be closed. (If I don't get the ringtones to work, then I'll probably open a new topic since the other postings didn't provide an answer.)

Edit: I copied my custom ringtones from /home/user/MyDocs/Music to /home/user/.ring-tones and set them for each contact (some contacts have the same ringtone). It seems to work so I am once again a happy camper!