reg of pdf search from getpdf
there are certain pdf converters available which lets you to create pdf out of any software.
one such is "pdf995".Try geetin the s/w if it is available.
there in orcad or whatever design tool,once you give print ,you can choose either the printer or this pdf coverter.If you choose pdf converter in the print option,it will generate the pdf fiel of your design instead of sending it to the printer.
and then is the most important part."just save that pdf"
thats it