If you are using a non-english WM2003SE, you will probably get an error, when clicking on the Start Menu shortcuts. In that case, open your file manager and rename your programs' folder (e.g. "\Programme\") to \Program Files\ and then try the Start Menu shortcuts "Unhide" and "Unlock" again.
I po tym lecisz normalnie z reszta procedury przygotowania BA do zmiany systemu na wyzszy.