Yes the older version of Slicer is still available - it's more forgiving of non-solid objects, but lacks the newer one's ability to 'slot' parts. export for CNC etc...

Welcome Cameron, So the easiest way to do what you want is to get SketchUp 8Pro and send your drawing to LayOut. There you can easily set the scale to 1:1 and generate a PDF file which can be printed correctly. Barring that, you could make image exports and scale those in some application such as PhotoShop or maybe Inkscape to get the right size. I would draw a scale that can be included with your section slices so you can confirm that you've scaled the images correctly. A third option would be to create PostScript files from SketchUp using a plugin and print those. You won't wind up with a PDF file but maybe that's not that important.