Hello julli, first off welcome to the .org

Quote Originally Posted by julii
1) i read that u guys can should other factions. like gauls n other stuff. but during my game selection, i could only choose roman faction. y is that so???
To unlock the other playable factions in the game you need to first complete the campaign with any of the Roman factions.
However, you can change a file in the RTW folder to unlock all of the factions from the start, even the meant to be unplayable ones. To do this simply:
1. Go to you C:/Program Files/Activision/Rome Total War/Data/World/Maps/Campaign/Imperial Campaign (default path) and then open the descr_strat file in notepad or any other text editor program.
2. Upon opening this file it should look like this...
Code:
; 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
You should now change it to this...

Code:
; Custom campaign script generated by Romans Campaign Map Editor

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

end
nonplayable

	slave
end
...and your done. Just start up RTW and your away.

Unfortunatly I can't help you with your other problems regarding the actual campaign because it's been so long since I have played the campaign that my helpful information would be rendered virtually useless by the more experienced campaigners of the .org

Hope this helped,
- Toro