Renaming Columns in an Excel Spreadsheet

Hi,

I am a web developer. A customer just sent me an excel spreadsheet full of products because they can't get it to upload using an importing program. I have found that this is because the spreadsheet is not in the correct format for the program. I have the specs for the program and obviously the spreadsheet all I need is someone to rename the columns for the data to match the columns in the spec, unfortunately I can't share them publicly which is why I am posting this job as hourly, I expect it to take no more than 2.