Here's the 'Angelox' method;
go here
When you go into a directory, sort by date, newest up at the top. right click 'save as' on the files you see that are new.
Eventually, you'll have all the new files, copy them over to the most recent version EqEmU already posted.
Usually the changes are in /zone and /common - sometimes in /world.
You have to click on the file , tell you get to an option to save it.