I showed you today in class the process for printing a .ps file as a separation so you can check to make sure your 2-color newsletter has the spot color correctly set up. It is the same process (except this time you print booklet to make an 11 x 17 inch spread) to make a composite .ps file, just select separations instead of the Composite CMYK in the print dialog box. Distill the .ps file and open up the .pdf. If your file is correct, you should have 4 11 x 17, black and white pages in your .pdf. 2 for the front and 2 for the back. One of the two on the front and back will be the black plate and the other 1 of the two will be the spot color you select.
Keep this .pdf to show me. Once you confirm your spot color is correct (if it is not – fix it before you proceed) you can reprint the .ps file as a color composite, distill to the new composite .pdf and then duplex print your proof for Monday.