How to Print Large PDF (Template Image) on a Regular Printer
The easiest way to print a large PDF (at full scale) over multiple pages is with the free Adobe Acrobat Reader. Get Adobe Reader.
After you've created and saved the large PDF, open the PDF in Adobe Reader. Make sure the entire template image is visible in Adobe Reader (scroll to check).
Now select Print from Adobe Readers File Menu.
In the dialog that appears, select the Poster button. Set 'Tile Scale' to 100% and enter an Overlap value if you want the assembled pages to overlap for easy gluing/taping for assembly.
Click the Page Setup... button and make sure your paper size is set correctly (Letter, A4 etc).
The print preview in the dialog shows the entire assembled image with lines overlaid to show how the individual pages fit together.
When this preview looks correct, hit 'Print' to print all the pages and assemble to form the single large image.
The end result should give you the printed large image when assembled.