Each time got Corrupt files. I've tried via Europe, Asia and the USA to download PHP.
I guess this is too much for coïncidence. A reïnstall of an unzip-program would be a good start. Try to test to zip/unzip something smaller.
Could it be a sollution to present the files unzipped?
I don't think so. Zip-technology is the normal standard. The person installing moodle on their own server must know something about computers and programms. I think that someone who don't know this basics will get a lot of problems installing easyphp and editing a database or changing a config.php.
A user of a course dont need any knowledge about zip -files. And a teacher usind moodle mustn't know somethoing about this stuff. That is ok. But administrating personal must know some more things.