[siddharta]

There are various applications that do this by installing the PDF converter as a Printer in Windows. Eg, CutePDF is a free software that allows this. It is useful to print to PDF from private URLS, eg: payment confirmation receipts and so on.

Having said that, dont let it stop you because your site might be useful for the layperson who doesnt understand all this stuff about installing something as a fake printer and then printing through that.