Try putting this on your russian site:
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1251">
</HEAD>
and/or this:
<META http-equiv="content-type" content="text/html; charset=koi8-r">
And check this site for more info:
http://ourworld.compuserve.com/homep...or/cpage_e.htm