I solve many problems like this by using Adobe acrobat. If you print to a .pdf file format, you can then print it on any printer and almost any computer regardless of operating system. The .pdf files are also suited perfectly for email or web posting. In addition, Acrobat reader can scale the print to the size of the paper in the user's printer.You therefore design the page layout in Finale at 11 x 17 or whatever you wish. Print to a .pdf file (Acrobat installes a printer called "acrobat distiller". This file can be taken to Kinkos and printed on what ever they have. In addition, you can print the result on your 8.5 x 11 by simply checking the box in acrobat reader "Fit to Page"
I know Adobe Acrobat 4.0 is a little expensive, but it is well worth it. I could not work without it now. There are a few shareware things out there that can make .pdf files from postscript listings, but I do not recommend them. If you want it to always work without a lot of tweaking, then get the real Acrobat 4.0 from Adobe.