Go to the locagtion:
HKEY+CURRENT_USER\Softrware\Microsoft\Windows\CurrentVersion\Policies\explorer
open %windir%\system32\msgina.dll file in resource hacker
goto dialog-> 20100-> 1033
if u want the following look ie hibernating on the bottom centre
paste the following code
20100 DIALOGEX 0, 0, 208, 122
STYLE DS_SYSMODAL | DS_SETFOREGROUND | WS_POPUP | WS_BORDER
CAPTION ""
LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
FONT 8, "MS Shell Dlg"
{
CONTROL "Flag", 20101, STATIC, SS_OWNERDRAW | WS_CHILD | WS_VISIBLE, 176, 0, 32, 26
CONTROL "Good Bye", 20102, STATIC, SS_OWNERDRAW | WS_CHILD | WS_VISIBLE, 7, 0, 162, 26
CONTROL "&Stand By", 20104, BUTTON, BS_OWNERDRAW | BS_NOTIFY| WS_CHILD | WS_VISIBLE | WS_TABSTOP, 45, 47,22,20
CONTROL "Switch &Off", 20103, BUTTON, BS_OWNERDRAW | BS_NOTIFY| WS_CHILD | WS_VISIBLE | WS_TABSTOP, 91, 47, 22,20
CONTROL "&Reboot", 20105, BUTTON, BS_OWNERDRAW | BS_NOTIFY| WS_CHILD | WS_VISIBLE | WS_TABSTOP, 140, 47, 22, 20
CONTROL "&Hibernate", 20106, BUTTON, BS_PUSHBUTTON | BS_NOTIFY| WS_CHILD | WS_VISIBLE | WS_TABSTOP, 79, 94, 48, 20
CONTROL "", 20108, STATIC, SS_OWNERDRAW | WS_CHILD | WS_VISIBLE |WS_DISABLED, 22, 73, 50, 8
CONTROL "", 20107, STATIC, SS_OWNERDRAW | WS_CHILD | WS_VISIBLE |WS_DISABLED, 79, 73, 50, 8
CONTROL "", 20109, STATIC, SS_OWNERDRAW | WS_CHILD | WS_VISIBLE |WS_DISABLED, 136, 73, 50, 8
}