Greetings,
Navigate to the folder that contains your installation of NX5. Then expand the \NXPLOT\config\pm_server folders. Inside the folder will be the following files: ps_ledger_init (creates 11x17 pdf), ps_legal_init (creates 8-1/2x14 pdf)and ps_letter_init (creates 8-1/2x11 pdf)configuration files. These files contain settings for paper sizes for the post script files used to create the pdf files.
These files can be opened with WordPad or NotePad text editors. In the files you will find a setting that reads /PageSize [612 792] (settings for 8-1/2x11 paper) in two different places. Change the numbers around in both places to read [792 612]. This changes the *.ps file to be output as 11x8-1/2 instead of the standard 8-1/2x11.
Now the pdf files will be created in landscape mode.
NxPerson