[moved from Ask Hobby Lockpicking Questions to Locksmith Business Info]
a model specific guide for replacing lost keys? what are you asking exactly, this question is confusing.

do you mean like.. if I drive a 1994 Honda Accord and lost all my keys, what do you do to make new keys? or what key blank to use? or how to recover the key code to cut a new key? please clarify for us.
are you already a locksmith or someone learning to become a locksmith or get into auto work?