Err.

Every time I click 'Download' on the scripting documentation, by Patchou, it'll open up windows explorer and show me my Harddrive.. ?

It doesn't do this with anything else.

I'm using Opera browser, by the way, with quite a few widgets.

I have the latest Windows Live Messenger, the latest Plus!, with only a few scripts, but I doubt that makes much of a difference considering this is a different kind of problem.

the file is a chm file, try downloading the zip file from http://mess.be/pafiledb/pafiledb.php?action=download&id=673

and then extract it and try to open it, otherwise your computer either has a problem opening chm files or does not support them.