Thanks Dave.

I was reading the info from http://support.microsoft.com/?id=305528.
If I use Microsoft Office XP Developer Edition to package my Excel app
(which saved in Excel 97 to 2003 format), can the recipients run the
app on their Excel 2000 machine?

Also, what does the following do in plain English? Do I put it in a
batch file?

net use Z: /d
net use Z: \\naras0\someshare
attrib -h %systemroot%\system32\mscomct2.ocx
regsvr32 /u /s %systemroot%\system32\mscomct2.ocx
xcopy Z:\mscomct2.ocx %systemroot%\system32 /h /q /v /y
regsvr32 /s %systemroot%\system32\mscomct2.ocx
net use Z: /d

mscomct2.ocx contains;
Microsoft Animation Control
Microsoft UpDown Control
Microsoft MonthView Control
Microsoft Date and Time Picker Control
Microsoft Flat ScrollBar Control