Creating pdf with bookmarks using ps2pdf ??

Hello to all,

I have a *.ps file, which needs to be converted to a pdf file. The file is huge & i would like it to have bookmarked according to main titles (already provided).

What is the option used in ps2pdf command, that will generate bookmarks from a *.ps file ? Kindly help. Thanks.

currently i am using the following commands

groff -tps -t -U "doc.n" > doc.ps
ps2pdf doc.ps