I know this is 11 months late, but if anyone is interested and hasn't worked it out for themselves yet, I have some theories on what the other numbers are. These might be shown in the XLS files that are available, but I don't have anything to read them with so I thought I would post them anyway.
From the file:
6
Republican 0 0 50 0 4 21 2 5 15 -1 0 91 148
Tutorial 2 0 50 0 4 22 1 5 15 -1 0 79 -1
Gauls 1 0 50 0 4 22 1 5 15 -1 0 93 -1
Cheat 3 250000 250000 0 26 22 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 0 23 24 25 -1 -1 -1 -1
MithrasRome 4 0 50 0 4 21 2 5 15 -1 0 91 148
MithrasGaul 5 0 50 0 4 22 1 5 15 -1 0 93 -1
ok...
The first number ("6") is the number of different sides available. This (I presume) will have to increase if you add more sides.
Name?____No._Fame_Money__?1_NoStartUnits_U1(Leader)_U2_U3__U4_UEtc____Un/LockCampaign_Hidden_?2__?3
Republican_0____0____50_____0____4_________21_______2__5__15___________-1____________0_____91__148
Cheat_____3_250000_250000__0____26________22_______1__2__3__4 ... 25____-1____________-1____-1___-1
Name? = The Name of the Side
No. = The Number of the Side
Fame/Money = Starting Fame/Money
?1 = I dunno. They are all 0, so you need a trial/error approach to find what they do.
NoStartUnits = The Number of Units, with which you start. Unknown if there is a max. 20 maybe?
U1-U4 = Unit Number 1-4. Find the relevent numbers in the unit files.
UEtc = Unit Number 5-... (rather stupid for me to put U5, U6, U7 etc)
Un/LockCampaign = Allows you to lock or unlock a campaign (meaning you have to/don't have to do the prior campaigns) -1 = Unlocked, 0 = Locked.
Hidden = Stops the campaign appearing in the menu. Cheat is hidden by default meaning you don't see it as it has all units. -1 = Hidden, 0 = Visible
?2/?3 = Not sure what these do, but I believe they are linked to which army, or campaign you play.
With ?2, both Roman sides are 91, both celtic sides are 93, the starting campaign is 79, and cheat is -1. However, changing them doesn't appear to have any effect on them.
It is possible to add new sides in. Adding one extra will create a button for it next to the Celtic image. However, LA crashes whenever I finish the opening cinematic.
Just curious if anyone knows anymore about these numbers.
Edit: just found Modding the Demo, Part 1 :p You have explained some of it, but I think I have added to it?