Here are three great video links with strength coach Mark Rippetoe. Rippetoe goes over the proper setup and excution of the press.
http://www.youtube.com/watch?v=GJFjYyA40ss&feature=PlayList&p=A1B17802DA099CB5&index=27&playnext=3&playnext_from=PL
http://www.youtube.com/watch?v=TtTEMRse54g&feature=related
http://www.youtube.com/watch?v=VkY9aa3okxw&feature=PlayList&p=A1B17802DA099CB5&index=26&playnext=2&playnext_from=PL
“Nobody can go back and start a new beginning, but anyone can start today and make a new ending.” -Maria Robinson