Make a HUD layer and set its parallax to 0,0, put all your HUD stuff on this layer and it will stay in place. Just copy the layer to each new layout along with its event sheet and use global variables.
There are a couple of programs out the for making sprite sheets of 3d models, off the top of my head I know of SpriteWorks http://www.garagegames.com/products/spriteworks
its $49.95 on garagegames website, but there are others. Jut Google "3d model to spritesheet".