When I try to open the files in question, nothing happens.
If you are trying to edit files you need to get a text editor, I would recommend using Crimson Editor. It has tabs, but don't be tempted to edit more than one file at a time unless you are making comparisons, open them, edit them, and save them in a different location that maintains the locations of the files, which means that if the file was in \includes
you need to make a folder for your mod with a folder inside it called \includes
and put it there, making sure that you don't capitalise any of the names.
And whatever you do, make sure that you follow this method:
Put all the files for your mod in a new folder and give it the name of your mod, making sure you include any files that came with the instructions.
Never, ever ever ever, do a second mod without testing the first one, you'll make lots of work for yourself redoing them.
When you want to do a new mod, copy the previous mod folder and rename it so that they stay in alphabetical order, like this:
a Karma Mod Folder
b Quick Reply Mod Folder
c Shoutbox Mod Folder
Then edit the new folder only, this means that you can undo mods.
And once you have done that, make sure you do these four things:
If your mod affects any files with 'registration' in their name, or you suspect the mod might affect it, register a test account and make sure you get the activation email, and that this still works. This is because you might not find out for months that nobody can register as people rarely, if ever, tell the admin! Make sure you delete the account afterwards so that you don't have junk accounts and extra email addresses.
Post somewhere in your forum, this is a very good bench test! You might find you can't complete this, especially for mods that affect the viewforum or posting files.
Send a PM to yourself, and check you can read it, if you don't your PM system could be down for weeks or months.
If your mod affects admin or moderator panel files, check you can still use them.
Unfortunately, the Karma mod is still not working and I have no idea where to start.
I am using the CA Black style from this site http://beta.colorizeit.com/
my problem is that the mod tells me my breadcrumbs file is missing or corupt when I try to add or remove Karma, but everything else works fine.