I found also the PHP 4.3.9 update script from Ergin. I think this one could be used, too!?
Give it a try
And if it works please update the wiki page with any changes after you test it out yourself. There were also some good suggestions by smeghead (download verification, etc) and me (combining the 2 scripts into one) on page 3 of this thread that haven't got put into the wiki page yet. Maybe give those a try as well.
Greg