Hello Pankaj,
stupid question :-) but why do you need to transform such big lists in PDF? Would it be no better to have them looked in AFP?
Otherwise, it would be to store the documents directly in PDF... it would be better for the retrieve time.
Using ODWEK to do that, I suppose you need to know the AFP format in order to know where begin a new page and finish a page.
Then you could simply cut the pages, and deliver part after part of PDFs... or something like that.
That's only an idea.
Sincerely yours,
Alessandro