Below is an Excel spreadsheet which works well for documenting floor variations. Just click on "Excel Spreadsheet" to copy it to your computer, or shoot me an email asking for the file & I'll send it over. mikeeast@vci.net
This is a much more in depth program for contour mapping- http://www.3dfmaps.com/
The Paintbrush program from Microsoft Accessories can also be used.
Excel Spreadsheet -1.1 -2.3 shower tub living 1.7 master bath 0.0 -0.9 master bedroom kitchen -2.9 living island 2.3 hallway -0.6 bedroom bedroom entry 0.0 1/2 bath -3.0 dining utility -3.5 stairs