wine users - Nov 2010 - Can I set the locale for the file system?

I want the filenames are stored in utf8, can it be done?
and for non unicode programs would be locale such as in my case win1251

All ok, problem solved!

#export  LANG="ru_RU.UTF-8"
#wine app.exe

or edit /etc/login.conf in russian|Russian Users Accounts:\
:charset=UTF-8:\
:lang=ru_RU.UTF-8:\
:tc=default:

cap_mkdb /etc/login.conf
pw usermod -n username -L russian