OpenOffice doesn't like my spreadsheets

Finally got my Win2k box to map my Fedora box as a network drive and transferred over a bunch of stuff. First thing I discovered is that my Excel spreadsheets apparently use a bunch of functions that aren't implemented or have slightly different implementations by OpenOffice's spreadsheet. There are a bunch of 502 and 504 errors that I'll have to try to figure out how to fix. Already the transition to the Fedora desktop isn't quite as seamless or painless as I hoped. Still, it could be worse.