I have not seen any standard way of creating NPC's so I say go for it however you wish.<br/><br/>If a NPC has already been created by someone else, I would say that it would be best to ask that person's permission before using him/her.<br/><br/>The way that you would be using them would be good.  One rule of thumb that I am thinking of is if you give a NPC a name and he/she is already working in an established place in town, it would be best to ask the player's business owner if you can create that NPC there.<br/><br/>Hope that helps to answer your questions *Smiles*