Hmmm, well it's not ideal, but you can open ASP pages (as long as you have an ASP server to serve them), by just using
the fopen and fpassthru functions (etc).
check the manuals for reference of these functions.
This means that you can parse the ASP output, or reformat it using string manipulation functions - then re-output it through your PHP page.
It's not very graceful,- probably very slow (depending on server/network performance), and you're probably (read definitely) much better off rewriting the stuff in PHP from scratch.....
cheers,