If you havent heard of TEdit ... go download that NOW it is very cool and helpful heres how, First you dowload tedit then go to it in your files then compress it, now you will have a green file in your files, pin that to your taskbar. Next open it up then you might wanna watch a video about tedit because... complicated. After that you should know the basics of tedit then...

You should click the npc data button and click the arrow then pick the npc you want then click add npc, repeat this step until you have all the villagers.