How do you install PHP on Win98 with PWS?

Hi, I'm trying to get PHP (4.1.2 I think....the new one) working on my Windows 98 PC, using PWS (don't know what version). I've downloaded the "install" CGI script from php.net, which says it does it all for you, and I've also had a quick play round with the .ini files (moved different ones to the c:\windows dir). I still can't seem to get it working, and when I've published HTML files with PHP script in them, it just displays a blank page. The only thing I'm trying to do at the moment is getting it to say "hello world", but later on I'll be using it to link with MySQL. Can anybody tell me how to get this working. Thanks Keith