here we go, here we go, here we go!!!
1: create a model in Object Mode.
2: switch to Scene Mode by Menu
3: Import any of your models in Menu
3a : make sure all your models are imported in object Mode before you begin
4: To add background Menu
4a: From this bit you can add a picture, Click off the checkerboard or leave it on if you so desire
From then on, you might ask how do I add a ground floor etc ... but that will be answered in another post i expect ......why not visit http://animanon.xtreemhost.com
where some of your questions may be answered.