Can anyone give step by step instructions on taking changes made to the core phpbb3 build and turning them into a mod package? Most of the changes are contained within new files (e.g. a new functions file, new templates etc.) though there are one or two changes to existing files.
Where do I start?! Do I have to hand write all the changes for the MODX and include the new files in the root folder, or is there a quick way to identify the changes and make the MODX? Is that even what I have to do? lol
Thanks

edit:
I've now discovered I can compare files using WinMerge which makes life easier - that creates the mod's root folder without a problem, what else needs to be done? reading as much as I can but I'm just getting more confused

edit2:
Right, getting somewhere I think! Am I right in thinking that my mod package .zip file should contain the following:
/root/[any new files]
/modx.prosilver.en.xsl
/license.txt
/install.xml
Where install.xml is the MODX file detailing file copy (for /root/) and sql inserts/core phpbb code changes?