Thanks for the suggestion doobster, but I had already looked there. Nothing that I can find fits my needs. I've looked into the PEAR Spreadsheet_Excel_Writer package but that doesn't appear to work to well with existing workbooks. At this point I'm thinking it'll be easier to just output the results into a CSV file and import it into Excel afterwards. But if anyone still has sugestion, tutorials, whatever I'd be glad to hear them. Thanks