Sounds like what you're missing is the follow/assist configuration.
You're telling me a bunch of keys you hit in the game, but if you didn't set it up in ISBoxer on the final page of the Quick Setup Wizard, then nothing is going to happen when you press Alt+F. As far as Ctrl+Shift+Alt+G, I am unclear on what you did after pressing it to "set the first person", and I also don't know where you put Alt+F -- which to be clear, you should not be putting anywhere.
So let's take a step back.
When you use the Quick Setup Wizard, the final page has a
Follow/Assist Mode drop-down in the middle of it, and below that are options specifically for ... following and assisting. By default, the Hotkey (which you press) for making your toons follow you is Alt+F, and the one for assist is Alt+A. However, these are just buttons for
you to press -- ISBoxer still needs to know what to press for the game to do things. Depending on the option you pick in the drop-down box, there are different settings you'll want to fill in to make following and assisting work.
1. An in-game Key Binding which does "Follow Target" (auto-follows your currently selected Target). There is no reason to set this to Alt+F.
2. An in-game Key Binding which does "Assist Target" (selects your Target's Target). There is no reason to set this to Alt+A.
3. An in-game Key Binding which Targets whoever you're going to Follow/Assist.
By default for DAOC, ISBoxer should be using "Target current Slot, then Follow/Assist Target". This means it has a table of F-keys it presses to target your party members. The table should automatically fill in with the correct keys for DAOC, but ISBoxer still needs to know the in-game key bindings for Follow Target and Assist Target.
I don't know what changes you've made to your ISBoxer configuration to try to get it to work, but what I would suggest is to go to File, select Clear (use Save As first if you have stuff you want to back up) and then use the Quick Setup Wizard again. On the last page, make sure to fill in the Game Key Bindings for Follow Target and Assist Target, and that should pretty much make it work.