Adobe Acrobat 7 Professional - Manual (Page 645)

Saving advanced print settings
Print settings are preserved only as long as the Adobe PDF document is open. To use the
settings again, you can save them in a file.
To save a print settings file:
1. In the Advanced Print Setup dialog box, click Save As.
2. Specify a file name, and click OK. Print settings are saved as .spf files.