The Program I pointed you too is called UIF2ISO and unfortunately when you click on the link takes you to an Italian web site. If you go to the bottom of that link you will see '2 Users commented in this post' the bottom comment 'Kev Says' takes you directly to the uif2iso download (in English). The Site I pointed you to is gHacks.net. If my link doesn't take you there let me know.
I have tried it several times and it appears to work for me.