Print Excel to pdf in bulk

Hi I am currently using Adobe pro 7.0 and have had the task over the past few days to convert excel docs to PDF. I know I can open the excel form and use the convert to pdf button but ideally I would like to automate this. Has anyone got any ideas on how to do this, I looked at distiller but this only uses .ps files to convert. I also have been looking at Batch Sequencing but have not managed it. Any ideas would be appreciated.