I thought I'd go ahead and make an example.
The file
sphrmd03.pdf contains plans for a model of mine. It's from here:
The GNU 3DLDF Sphere and Dome Models Page
The image s4.pdf shows page 4. It's in DIN A3 portrait format (297mm x 420mm). The image itself is an EPS file which I created using GNU 3DLDF and MetaPost. However, that's irrelevant in this context, an EPS file generated any other way will work just the same way.
The file
sphrmd03_a4_mag_test.pdf contains the image from page, but in DIN A4 format and scaled by 1.41429. It doesn't fit on the page, but is shifted around on consecutive pages so that different parts of it can be printed.
The images s_a4_1.jpg through s_a4_5.jpg show the individual pages of
sphrmd03_a4_mag_test.pdf. I converted them to JPEG using GIMP.
The TeX code is in the file
sphrmd03_a4_mag_test.txt. The PDF file is created like this:
tex sphrmd03_a4_mag_test.txt
dvipdfmx sphrmd03_a4_mag_test.dvi