I know how to program the fmc for a flight but not a circuit, any tutorials on that?

If I may suggest a great "introduction" book to get. Mike Ray's has a great book that helps learn the basics of creating, imputing and flying FMC flights for Boeing aircraft. http://www.utem.com/shop/index.php?l=product_detail&p=4 This is the book that really got me into understanding the FMC/CDU/MCP functions. Much like Rod Machado, he teaches with humor which makes for a enjoyable read. Worth a look in my opinion. :( Once you have the grasp of the FMC, the PMDG manuals will further help in the in-depth science of this intricate piece of navigation technology.@Joe,As far as I know, A typical circuit can be achieved by inputing a DEP, FIX, and ARR (same as DEP arpt) I believe that is the minimum criteria for creating a flight plan via the FMC