Along the same lines, and without meaning to steal anyone's thunder, here's a frame drawing that I did in Microsoft Word using the vector drawing tools, each part of the frame is made of grouped components, you can ungroup them to remove things you don't want or to plan frame mods ( *gasp!* ).
This drawing is 1:10 scale, and based on my setup of 19 inch front and 16 inch rear wheel with 12 inch shocks. Here's a JPG version.
This was based on the following dimension drawing, I traced over the lines and adjusted the drawing to be dimensionally accurate to scale:
By taking digital pictures of my various components then performing the same tracing process, I was able to mock up my bike digitally. This is accurate enough to tell me that if I proceed as planned, my resulting trail will be too much (7.1 inches):
I've attached the original DOC file, authored in MS Word XP.
cheers
mystic_1