Windows Server 2003 Service Pack 2 MUI Pack (32-bit x86) Update - http://www.microsoft.com/en-us/download/details.aspx?id=2124
Russian MUI for Windows Server 2003 R2 x86 - http://192.200.125.101/windows_2003_server_mui_rus.zip
language change
start -> Control Panel -> Regional Options -> Languages -> Language used in menus and dialogs
Windows Server 2008 (R2) - http://www.microsoft.com/ru-ru/download/details.aspx?id=2634