Having problems with houses in chipsets

I feel like such a n00b asking this, but whenever I use a chipset for an exterior town, I can never figure out how the house is supposed to look. Since all the parts are messed up in the chipset, it's confusing and I'm always missing something and I don't know what something's used for, and lately I can't figure out why the door won't work. xD Here's some chipsets in which I can't figure them out. If you could show me how it's supposed to look with a certain chipset, I would be most appreciative.

http://wingless-dreams.net/1.MacTown.png
http://wingless-dreams.net/14.MacImperialCity.png
http://wingless-dreams.net/6c.MacInn.png

have u changed all the properties? Whenever u add a set you have to go into the properties and fix them up before u can use it

You mean like what you can walk on and what you can walk under and such? Yes I've done that.

It's the actual designing of the houses that I'm having problems with. Like what piece is supposed to go where to match the house.

just keep playing around with the chipsets until u get it. Its like a puzzle.