combine contact form, submit page and set a redirect on completion

Very simple we have a contact form which submits basic info through a submitemail php page then throws up a message sent message, however we want it to redirect to a thanks page when completed, all other functionality (like checking fields are completed etc) must remain intact and use the same page design. Page is built in Dreamweaver CS5 using DWT template if that makes a difference to you File attached No budget for this just dont have the time to do it, so whoever sends the files back to me edited and working you get my next php job guarenteed