Why my $SERVER_NAME variable is not working anymore?

Hi. This is a stupid question, I know. I'm using my old set of routines well documented and bullet proof. They were working just fine on Win and Linux systems, regardless of webserver of php version, UNTIL php 4.3.x - IIS over Win destroyed my life. Is there something I can do on php.ini file or whatever to fool PHP to keep recognizing the old-style posted and server variables?? Yes, I know that is risky to keep working that way, but the projects I made were so small that its not worth to change all the code just to improve security! Any help will be welcome. Thanks Gabriel PS: I always compared PHP to IBM AS/400 RPG language, bc they share an incredible ROI, but now....