I don't know what to do then, you could patch to RTW 1.5, go to C:\Program Files\Activision\Rome - Total War\Data\world\maps\campaign\imperial_campaign and open the descr_strat file, and look for this line

; Custom campaign script generated by Romans Campaign Map Editor

campaign imperial_campaign
playable
romans_julii
romans_brutii
romans_scipii
end
unlockable
egypt
seleucid
carthage
parthia
gauls
germans
britons
greek_cities
end
nonplayable
romans_senate
macedon
pontus
armenia
dacia
numidia
scythia
spain
thrace
slave
end

change it to say

; Custom campaign script generated by Romans Campaign Map Editor

campaign imperial_campaign
playable
romans_julii
romans_brutii
romans_scipii
macedon
pontus
armenia
dacia
numidia
scythia
spain
thrace
egypt
seleucid
carthage
parthia
gauls
germans
britons
greek_cities
end
unlockable
end
nonplayable
romans_senate
slave
end

And you can play as any of the non CTD prone factions!!