Windows installer didn't install

Hello, can anyone help a frustrated would-be php installer? Try as I may I cannot make much sense of the installation instructions and the Windows Installer has not done its business for me. I have Win98 with PWS (don't know what version or how to establish the version number - the exectutable appears to be inetsw95.exe which claims to be Internet Services Application v. 1.0, the product version is 4.70.1181, so whether thats ver 1 or ver 4 I don't know!) I've downloaded the .zip package and the installer. I unzipped the package into c:\ - which actually put everything into a folder succinctly named php-4.2.2-Win32 which I then renamed php. I ran the installer accepting every default and it said it had installed php successfully. However my simple file... <html><head> <title>Hello</title> </head> <body> <?php phpinfo();?> </body></html> ...doesn't get php-ised - the browser (IE6) shows a blank screen and view source shows me the above code. I've edited my php.ini (which installer apparently correctly placed in c:\windows) with extension_dir = c:\php\extensions but still no success. I'm aware something is wrong with the configuration but install.txt doesn't help at all. Help me please....