I've run into a wall here- beyond that initial success with Jahan, nothing I change (like the AP cost or description of a spell, or a different character's stats, etc.) has had any effect.
But to answer your question, you'll find Jahan and Madera in the 'character.txt' file as entries Henchman_Jahan_Mage and Henchman_Madoc_Paladin respectively. I noticed when editing Jahan that his scores are all one less than the actual stats- so if you put a '4' in perception he will actually have 5. [Not the xlsm here; from the folder with all the xlsm files you can go to generated>data>characters]
There also appear to be a couple (like just two) other henchmen there, *possibly* vestigial bits of the other two companions that didn't make it into the game upon release. They're called Alfred the Fighter and Frank the Archer, anyways.
You can make the changes in the xlsm files, too, though. If you make your changes there, open the excel file called 'all' afterwards, which contains nothing but a big 'generate' button. Clicking the button will cause all the excel files to update their corresponding text files. I don't know if there's any reason to do that rather than edit the text files directly, though.
As for the actual henchmen you can recruit in the Hall of Heroes, they don't seem to be in that character file. I could swear I saw a list of them and their stats when browsing through some other file, but for the life of me can't remember which- and checking again now, can't find that list again (if I did see it in the first place).
Last edited by JTE10; 02/07/14 07:22 AM.