Change page when viewed by iphone

I am using the piecemaker plugin to show my portfolio which looks great on my website, but doesn’t show up on my iphone as it is made in flash. I really want to keep the piecemaker but i want my site to be viewable on an iphone. I thought of just putting a link at the top of the page saying ‘if you are viewing this page on an iphone click here’ and linking to a css slideshow, but I was wondering if there was a plugin that would automatically recognise that it was being viewed on a phone and show the appropriate page.