Does anyone have any good resources for converting Excel 97 macros to 2003?

I have a spreadsheet that was programmed back in 1999 with tons of macros
and functions. I need a resource that I can go through and determine what has
been replaced or not supported.

The issue that brought this up was the fact that in some of the users Excel
2003, the pages are not lining up the same as in Excel 97 or even identical
installs of Excell 2003.

If anyone is intersted in seeing the file, let me know, I can email it to
you.