Imposing PDF pages on an exiting rotated PDF page

Q: I was trying to do imposition and I want to place two scaled down
copies of an 11 x 8.5 source page on an exiting rotated (landscape)
PDF page template. The sample source code provided on your website
produces weird result. I believe that the problem is that the
destination page is rotated (landscape) but I am not sure how to
account for this rotation when adding new content.
A: Please take a look at the following article:

or search for " add new content to an existing (rotated/cropped) PDF
in PDFNet KB (