Right there in the command line you supply:
Code:
osascript -e 'tell application id "OOut" to export front document as "OORTFPboardType" to "~/tmp.rtf"' > /dev/null 2>&1
/System/Library/Printers/Libraries/convert -f ~/tmp.rtf -o output2.pdf > /dev/null 2>&1
the "-o output2.pdf" portion of the convert command tells it to write the output to a file named "output2.pdf" in the current directory. If you want to put it in the directory called "Example" in your home directory, that would be "-o ~/Example/output2.pdf" and so on. Rob's illustrative snippet illustrates the process of building up that command string. To save you the trouble of copying the file to the NAS volume and then deleting the local copy, you could write it directly to the NAS volume. All of this supposes that you've already figured out what the name of the file is going to be, of course...