2003 Honda Odyssey Ignition lock replacement



My 2003 Honda Odyssey ignition lock will not allow me to turn the key and start the vehicle. I have already tried applying wd-40 to the key to see if excess dust had frozen the tumbler. I have also seen that Ican buy a replacement lock at auto parts sites. Can this job be done by a DIYer without the Honda computer system. Also I live 90 miles from nearest town, so trying to avoid the tow bill or the locksmiths time to drive out to my vehicle. Thanks