you didn't look hard enough...
There should be installation/patching instructions in the Zip or .rar file that you Dowloaded. The patch files only contain some files that should take the place of the files with the same name in you're WE7 directory.
this note is from the Wendetta 1.2 patch:
- Buy the original game
- Install it
- Extract the patch file in the Winning Eleven 7I main directory.
- Overwrite we7.exe with the we7.exe that's in the patch.
- Overwrite data_e.afs with data_e.afs that was in the patch.
- Cancel all the Save dir (dont know what this means.. it might meant that you should find the directory that contains all the saved games and saved settings and delete them, so you could start off fresh so the older saved files won't mess up the new patch.)
note: you need Winrar to extract .rar or .zip files.
all this is a hell of a lot easier than applying patches to PS2 games.