Downloading patches

[jimdene]

I have downloaded Syphon Filter 2 patch pdx-sf2izip using GoZilla. Would somebody please please step me through the procedure from there.
When I click on pdx-sf2izip it opens the files and then gives options: unzip/install/file action and options.
Help would be much appreciated

Just looked through gamefreaks database, which says Syphon Filter 2 does not require patch. If so why are they listed for downloading?