Well in that case you would save that diff (just the actual part that's the patch) as a file called patch (for example) and go to the directory where the source is and do
patch -px < patch
where x depends on what directory level you are in. it will be a number 0-4 or whatever... Depends on how many /'s you need to strip off the diff file. Man patch will give you some hints, tho trial and error might be quicker. The wrong number will just give an error
