I am currently working on a project where we are trying to profile
around 20 different events, and needless to say event multiplexing would
be very useful. I found a source on line which gives a patch (which
doesn't have a patch file in it. . .) that will allow this.

Are there any easier ways of achieving event multiplexing than replacing
the oprofile associated files in my kernel source with those from the
patch and recompiling? Any other suggestions for this?