[Swede]

The WinXP regedit.exe has the identical name...

From WinXP helpfile:
"The registry in Windows XP, 64-Bit Edition is divided into 32-bit and 64-bit keys. Many of the 32-bit keys have the same names as their 64-bit counterparts, and vice versa. The default, 64-bit version of Registry Editor that comes with Windows XP, 64-Bit Edition displays only the 64-bit keys.

To view or edit 32-bit keys from the registry of a computer running Windows XP, 64-Bit Edition, you must use the 32-bit version of Registry Editor in the %systemroot%\Syswow64 folder. You must close the 64-bit version of Registry Editor before you can open the 32-bit version, and vice versa. There are no differences in the way you perform tasks between the 32-bit version of Registry Editor and the 64-bit version of Registry Editor.

To open the 32-bit version of Registry Editor, click Start, click Run, type %systemroot%\syswow64\regedit, and click OK."

Maybe this is a clue...