T.F.
Put him right on the toilet :-) here are some helpful links
http://us.pampers.com/en_US/ltpt_tools_pottyguide.do?pg5375s
http://www.pottytrainingconcepts.com/Potty-Training-Boys/...
http://wiki.answers.com/Q/How_do_you_potty-train_a_three-...
http://www.babycentre.co.uk/toddler/pottytraining/forboys/
There are many articles and helpful links on the internet. Try to Google "potty train a boy" or a phrase like that.
Believe me it is SO great when they are finally potty
trained :-) Don't sweat it though if he's not ready yet. He won't go to college in diapers. Good Luck