It's relatively easy to track which files have changed with a directory compare utility. I have been doing this for each change in GWX for SH3 and been posting listings of which files have been changed, added or deleted. I just edit and modify the output to make it more readable.
I will probably do the same thing for SH4 as well. Didn't bother for SH4 1.0 to 1.1 because the patch was out so fast, there were almost no mods built just for 1.0. See my thread on changes from GWX 1.02 to 1.03 as an example:
http://www.subsim.com/radioroom/showthread.php?t=109698